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Analyzing the trajectory and mechanism of rural industrial change is important for understanding urban–rural integration and facilitating rural revitalization. Based on the data of industrial enterprises in 1112 administrative villages of Guangzhou, China, from 1978 to 2020, we identify the evolution trend of rural industry by investigating the spatial–temporal dynamics of industrial changes in rural areas. An extended triple-process framework incorporating urbanization and greenization was employed to unravel the underlying mechanism of the trajectory of rural industrialization. The results highlight the transformation from rural to suburban industrialization. In the past twenty years, rapid urbanization has contributed to the establishment of development zones. The agglomeration economy has led to a higher concentration of manufacturing industries in these development zones rather than rural areas. The eco-friendly development has resulted in a green transition in rural areas, further restricting the growth of traditional rural industries. Our analysis provides a nuanced picture of Guangzhou's spatial–temporal dynamics of rural and suburban industrialization. Meanwhile, it emphasizes the importance of urbanization and greenization in explaining the recent transformation of industrialization in China. [ABSTRACT FROM AUTHOR]

Due to a shortage of qualified professionals, many international cities have implemented a range of policies to attract skilled migrants and retain them for permanent work in destination cities, aiming to take advantage of the globalized competition. Despite being relatively understudied, the role of housing is of utmost importance, especially if skilled migrants can be attracted to work and live in destination cities permanently. This study conceptualized housing wellbeing as subjective housing feelings and objective housing outcomes, aiming to disentangle the relationship between housing wellbeing and settlement intentions. Based on the 2019 questionnaire survey in Guangzhou, this study found that skilled migrants who have become homeowners in Guangzhou have a higher propensity to settle in Guangzhou than those without homeownership. Also, this study found an inverted U-shaped relationship between the number of rooms and settlement intentions. Moreover, when the housing size per person is between 16 and 20 m2, housing size per person is positively associated with settlement intentions; nevertheless, when the housing size per person is below 16 m2 or above 20 m2, there is nil relation between housing size per person and settlement intentions. Finally, although skilled migrants are not satisfied with the current housing situation, they are still willing to settle in Guangzhou permanently. This study has extended the knowledge of housing wellbeing and contributed to profoundly understanding the complex settlement intentions of skilled migrants. [ABSTRACT FROM AUTHOR]

Ancient trees play an important ecosystem service role in high-density cities, revealing the zonal distribution characteristics of vegetation under climate influence. The ancient trees in Guangzhou and Foshan in 2018 and 2023 were taken as study objects to explore the evolution of their spatio-temporal patterns and to analyze the spatial differentiation characteristics of their driving factors using the geographical weighted regression (GWR) model. The results showed the following: (1) The ancient trees in Guangzhou and Foshan were composed of typical subtropical evergreen broad-leaved forest communities, mainly represented by broad-leaved species of evergreen dicotyledonous plants. The dominant species mainly included Litchi chinensis, Ficus microcarpa, Canarium pimela, Ficus virens, and Dimocarpus longan. However, there was a significant difference between Guangzhou and Foshan. (2) The number of ancient trees in Guangzhou showed negative growth, while Foshan saw a significant increase. However, species diversity in both areas increased, with the highest diversity in the northeast, higher diversity in the south-central part, and lower diversity in the western and northwestern parts. (3) The maximum kernel density of ancient trees in Guangzhou and Foshan differed 22-fold, indicating a spatial distribution pattern of multiple clusters. (4) The GWR model effectively explained the driving factors of the heterogeneity of the spatial distribution of ancient trees. The results showed that artificial disturbance was the most important factor affecting the spatial distribution of ancient trees in high-density urban agglomerations in the same vegetation zone. The study clarified the characteristics of the spatial distribution and species diversity of ancient trees in the region, revealed the driving factors for the evolution of the spatial pattern of ancient trees in highly urbanized areas, and provided guidelines for policies and measures for enhancing biodiversity and conserving germplasm resources in the region. [ABSTRACT FROM AUTHOR]

China is a burgeoning immigrant‐receiving country, and policies on immigration are just beginning to be developed. While African immigration to China was uncommon 30 years ago, China has gradually become a major destination for African immigrants due to its robust economy, welcoming universities, and low cost of living. Currently, there are increasing numbers of African students and professionals who are migrating to China to study or work. The health status of African migrants in China shapes their wellbeing, which plays a key role in strengthening long‐term cooperative relations between China and African countries. Although previous literature has examined the socioeconomic status of these African immigrants, the role of health insurance participation in shaping the health status of African immigrants remains obscure in China. Using data from the 2019 questionnaire‐survey in Guangzhou, China, this paper investigates the underlying mechanism driving African immigrants' health insurance participation as critical to their physical and mental health. Our results demonstrate that health insurance participation is a pivotal factor in the overall health of African immigrants; specifically, purchasing health insurance and one's mental and physical health can be characterised as a feedback loop. Purchasing health insurance can positively impact mental health, and consequently, better mental health can improve physical health. Good physical health also tends to bolster mental health. Therefore, policies aimed at improving African immigrants' mental and physical health are expected to encourage them to purchase health insurance above their present low level of insurance participation. The proposal here is that health policymaking for immigrants should include the interaction mechanism between physical and mental health rather than focus only on physical health conditions. [ABSTRACT FROM AUTHOR]

The creation of a dense, convenient, and diverse built environment is a strategic approach for fostering urban development. However, few studies have considered the relationship between a compact built environment and livability. This study seeks to answer the following question: What type of built environment is conducive to long-term residency? Using the Guangzhou urban district in China as a case study, we develop a livability-oriented assessment system for the built environment and integrate it into the hedonic price model. We employ spatial regression methods to analyze the impact of the built environment on housing prices, and findings suggest that (1) livability-oriented built environments are characterized by spaciousness, convenience, and diversity. Environments with a low building density, high building heights, a large plot area, and diverse land use are highly favorable for livability. (2) The built environment is intricate, and different factors can affect livability in diverse areas within an urban space. The impact of POI (Point of Interest) density and road density on livability varies by location. (3) The principles of small-scale blocks, high-density road networks, and compact urban planning are not universally applicable to the construction of livable cities. (4) The spatial heterogeneity of the built environment in the Guangzhou urban district is pronounced. This study addresses the assessment standards dominated by new urbanism. Under a livability-oriented approach, urban planners and managers should not indiscriminately pursue the construction of high-density and compact cities.

The adoption of Western planning ideas has significantly shaped China’s Central Business Districts (CBDs) and spurred economic growth. This article goes beyond existing research by exploring the “provincialization” of Western planning concepts, resulting in unique CBD landscapes in Chinese cities. Through a study of the Guangzhou CBD, it reveals how introduced ideas and local agents mutually adjust and respond to each other’s needs during the provincialization process. Under the “Reforms and Opening-up” policy, Chinese authorities drew from Hong Kong’s experiences to introduce the CBD concept, adapting it to underdeveloped land in Guangzhou and blending it with American downtown design. To meet urban space demands, industrial growth, and land economy needs, urban authorities reorganized local resources to create a discourse of the “central axis” to integrate the CBD concept into the urban layout. Consequently, both introduced ideas and local agents are intertwined to address challenges posed by each other, resulting in Guangzhou’s CBD framing a hybrid urban landscape.

Abstract The association between ambient temperature and mental health has been explored previously. However, research on the psychological effect of temperature in vulnerable groups and neighborhood scales have been scarce. Based on the survey and temperature data collected from 20 neighborhoods in Guangzhou, China, this study estimated the association between ambient temperature and community mental health among the elderly, adopting a fixed-effects methodology. According to this empirical analysis, compared to a comfortable temperature range of 20℃–25℃, measures of worse mental health among elderly were significant in high and low temperatures with increases in negative outcomes observable at both ends of the temperature range, leading to the U-shaped relationship. Second, the association between ambient temperature and worse mental health was found in the subcategories of gender, income, and symptom events. Specifically, from the hot temperature aspect, elderly males were more sensitive than elderly females. The effect on the low was far more than on the middle-high income group, and the probability of each symptom of the elderly’s mental health significantly increased. From the cool temperature aspect, the temperature in the range of 5ºC–10ºC was significantly associated with the probability of some symptoms (feeling down, not calm, downheartedness, and unhappiness) and the middle-high income group. Our research enriches the empirical research on ambient temperature and mental health from a multidisciplinary perspective and suggests the need for healthy aging and age-friendly planning in Chinese settings.

The association between ambient temperature and mental health has been explored previously. However, research on the psychological effect of temperature in vulnerable groups and neighborhood scales have been scarce. Based on the survey and temperature data collected from 20 neighborhoods in Guangzhou, China, this study estimated the association between ambient temperature and community mental health among the elderly, adopting a fixed-effects methodology. According to this empirical analysis, compared to a comfortable temperature range of 20℃–25℃, measures of worse mental health among elderly were significant in high and low temperatures with increases in negative outcomes observable at both ends of the temperature range, leading to the U-shaped relationship. Second, the association between ambient temperature and worse mental health was found in the subcategories of gender, income, and symptom events. Specifically, from the hot temperature aspect, elderly males were more sensitive than elderly females. The effect on the low was far more than on the middle-high income group, and the probability of each symptom of the elderly's mental health significantly increased. From the cool temperature aspect, the temperature in the range of 5ºC–10ºC was significantly associated with the probability of some symptoms (feeling down, not calm, downheartedness, and unhappiness) and the middle-high income group. Our research enriches the empirical research on ambient temperature and mental health from a multidisciplinary perspective and suggests the need for healthy aging and age-friendly planning in Chinese settings. [ABSTRACT FROM AUTHOR]

There are longstanding international housing policy concerns about the well-being and satisfaction of public housing residents and other low-income households. However, little is known about whether the location of public housing requires such lengthy commutes that it retards their fertility intentions. As a result, this study aims to examine the relationship between long commutes and the fertility intentions of young public housing residents and the underlying mechanism linking them. Based on data from the 2022 Public Housing Survey in Guangzhou, China, the results show that long commutes can weaken the intention to have children among young public housing residents. However, this effect is only found to be significant for the self-employed, part-time workers, and those working in the private sector, not for those working in the public sector. Moreover, the effects turn out to be more pronounced for those who commute by private car and active transportation than those who take public transportation. Finally, this study reveals that residential satisfaction mediates the nexus between long commutes and fertility intentions. This study makes an important step in advancing the scholarly understanding of the differential fertility intentions as a result of the spatial mismatch. [ABSTRACT FROM AUTHOR]

Rapid urbanization in China has shifted the logic and needs of rural resource allocation, prompting a transformative approach toward rural revitalization and sustainable development through comprehensive land consolidation. This paper offers a theoretical framework for understanding the driven adjustments in rural power, capital, and social structures facilitated by comprehensive land consolidation. It discusses how the construction of pastoral complexes influences the diversification of rural land use and ecological restoration through dynamic adjustments in power structures. This study illustrates that in Guangzhou, comprehensive land consolidation is indispensable for ensuring food security and fostering diverse rural industries. Furthermore, it facilitates the resource and commercialization of land, balances governmental social responsibilities with rational capital pursuits, and enriches the livelihood structures of social entities to ensure rural social equity. The pastoral complex model achieves a harmonious integration of rural socio-economic and natural systems. Innovations in paths of social participation help eliminate the effects of social inequality within the environment, while the theory of political ecology clearly analyzes the internal reasons for the interaction and strategic plays among diverse actors under this model. The case studies of the pastoral complex present the practice of national–capital–land–social relationships and changes in land benefits, showcasing a Chinese approach to rural development and social justice. This provides a new perspective for political ecology research and enriches its empirical content. [ABSTRACT FROM AUTHOR]

Objective: Under the prevention and control measures of COVID‐19, the epidemiological situation of respiratory pathogens is not well known. Understanding the patterns of respiratory pathogens epidemiology under the prevention and control measures of COVID‐19 is important to guide resource allocation for existing and future treatment and prevention strategies. Methods: In total, 659 fever outpatients nasopharyngeal swabs were collected at fever illness onset during June in 2022 at the First Hospital of Guangzhou Medical University. Swabs were tested by real‐time fluorescent single‐tube multiplex polymerase chain reaction (PCR) for 12 respiratory pathogens. Moreover, 108 of the 659 swabs were tested for influenza virus antigen. Results: At least one pathogen was detected in 477 (72.38%) of 659 fever outpatients with multiple pathogens identified in 25 (3.79%). The highest multiple infectious pattern is parainfluenza virus in combination with influenza (five cases). Influenza A virus (IFA), human rhinovirus (HRV), and parainfluenza virus are the three leading virus pathogens with proportions of 64.64%, 5.01%, and 2.88%. School‐age children and adult groups have the highest pathogens positivity rate of 81.28% and 83.87%. Conclusion: A high proportion of adolescents and adults has respiratory pathogens detected during fever illnesses during June in 2022 under the prevention and control of COVID‐19. These data indicate that diagnosis, prevention, and control of respiratory tract infection should be paid attention under the prevention and control of COVID‐19. [ABSTRACT FROM AUTHOR]

This study offers a discussion of the role of street music (busking) in urban public spaces using the lenses of performance theory and the theory of atmospheres in order to consider how street music and buskers shape the public space of a city. The study examines urban characters, soundscapes, emotions and affects, and atmospheres in relation to street musical performance. Explored in particular are the roles and processes of two levels of atmosphere—the atmospheric performance space and the atmosphere of a city. We take Guangzhou, China, as the case study and use questionnaires, in‐depth interviews, and participant observation as research methods to reach three main findings. First, street music has growing influence and affects how urban public spaces are appropriated and managed. Second, street music performance shapes the atmospheric qualities of urban public space and in doing so sensorially invigorates and animates urban space. Third, street music contributes to the broader atmosphere of the city. Such an atmosphere, created by Guangzhou's street music performances, that echoes Guangzhou's characters as a free, down‐to‐earth, tolerant, and vibrant city can be felt and warms those who encounter it. [ABSTRACT FROM AUTHOR]

This research investigates environmental inequalities within Guangzhou's Huangpu District against the backdrop of rapid urbanisation and industrial expansion in Asia. This study identifies environmental hotspots, particularly in socially vulnerable areas characterised by high industrial density, using a vulnerability framework and analysing census and pollution data. Utilising satellite imagery, urban planning documents, and field research, we delve into the internal environmental conflicts arising from industrial land use. Our findings reveal how diverse stakeholders, guided by their rationales and interests, collectively contribute to spatial inequalities within a market-driven context. Importantly, we emphasise that environmental inequality transcends mere conflicts of interest among stakeholders and is fundamentally shaped by the prevailing market-oriented spatial development model in peri-urban areas. This model results in urban segmentation, socio-economic stratification, and an uneven distribution of environmental risks and resources. Our study advocates for a paradigmatic shift in China's peri-urban spatial development and the integration of environmental protection and social equity alongside economic growth. We recommend moving away from short-term speculative practices and promoting long-term, community-engaged urban renewal strategies that harmonise economic progress with improved living standards and environmental sustainability. [ABSTRACT FROM AUTHOR]

Population aging is a global issue. China is facing the same challenge, especially in its megacities, with more than 10 million permanent urban residents. These densely populated cities urgently need the scientific planning and optimization of the layout of service facilities for older people. Taking Guangzhou, a megacity in China, as an example, this study uses point-of-interest (POI) data and the ID3 machine learning decision tree algorithm to train a site selection model for service facilities for older people. The model can help to select appropriate locations for new service facilities for older people more scientifically and accurately, and it can provide targeted suggestions to optimize the layout of the service facilities for older people in Guangzhou. First, Guangzhou city is divided into 29,793 grids of 500 m × 500 m based on the range of activities of older people, and 985 grids are found to contain service facilities for older people. Then, the POI data of the grid are fed into the ID3 algorithm for training to obtain a prediction model for the selection of sites for service facilities for older people. The effective prediction rate of the model reaches 87.54%. Then, we apply the site selection model to predict the whole city of Guangzhou, and 4534 grids are suitable for service facilities for older people. In addition, considering the degree of concentration of the elderly population in each street, we further filter out 1066 priority grids as the final site selection. Finally, taking into account the situation of the streets in different districts, we propose several strategies to optimize the layout of the construction of service facilities for older people. [ABSTRACT FROM AUTHOR]

BackgroundIron deficiency and iron deficiency anemia cause a huge disease burden worldwide. Diet is an important factor affecting the iron levels. This study aims to explore the dietary patterns of school-aged children in rural areas of Guangzhou and their association with iron deficiency.MethodsData on dietary surveys, lifestyle, demographic and laboratory tests were gathered from rural school-age children in Guangzhou. Factor analysis was applied to derive dietary patterns. Robust Poisson regression and subgroup analysis were used to analyze the association between dietary patterns and iron deficiency.ResultsA total of 2,530 children and adolescents aged 9–17 years were enrolled. The prevalence of iron deficiency was 13.36%. Four dietary patterns were identified including snack and fast-food pattern, fruit and vegetable pattern, cereal and tuber pattern and meat and offal pattern. Both children and adolescents in the Q4 group (the highest propensity) of snack and fast-food pattern and cereal and tuber pattern had a higher risk of iron deficiency than the Q1 group (the lowest propensity). Both children and adolescents in the Q4 group of meat and offal pattern and fruit and vegetable pattern had a lower risk of iron deficiency than the Q1 group. The results of stratified analysis showed the negative effect of snack and fast-food pattern and the protective benefits of meat and offal pattern are more obvious for boys, and the negative effect of cereal and tuber pattern were obvious for girls. The negative effect or protective benefits of the four dietary patterns were obvious for children aged 9–13.ConclusionFemales, older children, and those with shorter sleep duration are at higher risk of iron deficiency. Snack and fast-food pattern and cereal and tuber pattern are risk factors for iron deficiency, and fruit and vegetable pattern and meat and offal pattern are protective factors for iron deficiency. The impact of diet on body iron levels is more obvious in boys and younger children. The findings of this study can provide evidence for formulating prevention and control measures on children and adolescents iron deficiency and iron deficiency anemia.

Abstract Study on export paintings has gradually shifted from artistic form to cultural connotation, with an emphasis on cross-cultural communication. Although the economic and social dimensions of their artistic value have been explored, few studies delve into the connection between Qing-era Guangzhou's trade culture and its color characteristics. Utilizing the HSV color model and the k-means algorithm, this study analyzes the color traits of 35 export paintings depicting Guangzhou landscapes and works from the "Thirteen-houses commercial zone," revealing Qing-era Guangzhou's urban impressions and Sino-Western artistic interactions. Key findings include: (1) the hue pixel range in Guangzhou export paintings primarily spans 10°–60° and 120°–250° (dominated by red and yellow-green), saturation values range from 1–82% (primarily low saturation), and value values range from 11–94% (with a wide variance); (2) compared to traditional Chinese paintings, the transformation from pure color (正色) → inter-color (间色) → projection-perspective and light source illustrates both the blending of Eastern and Western artistic cultures and a diminishing influence of traditional ceremonial culture; (3) in contrast with Western artworks, some Guangzhou export paintings display a Westernization trend in color structures, evident in vibrant colors and stark chiaroscuro contrasts. As bespoke art commodities, export paintings microscopically reflect Guangzhou's unique trade culture and socio-political dynamics. The shifts in color schemes, integration of realistic styles, and human-centric characteristics unveil the intricate interplay between quasi-realism and transcendental aesthetics in Qing-era Guangzhou, as well as the nuanced dynamics between social capital and art within a global trade network.

The relationship between social factors and the formation of exported mug designs is blurred. This study addresses how they influence material design. Based on a quantitative typological analysis, this paper interprets the cultural relationships underlying the evolution of mug designs exported during the Ming and Qing dynasties. The study reveals: (1) the typology and handle styles of mugs can be categorized into six types, with a predominance of Cylindrical bodies and Ear-shaped handles. Notably, artistic emphasis is concentrated on Bulbous cup bodies and Tail outward curved handles; (2) the design of mugs in the eighteenth century exhibited diversity, morphological similarities, and feature continuity, evolving from representational (Ming Dynasty) to abstract and then to minimalistic styles (Qing Dynasty), particularly evident in the three-dimensional modeling of handles for ergonomic comfort (transitioning from a singular Outward curved form to Ear-shaped form, and then to Entwined branch form); (3) the body shape of mugs transformed from Arc-barrel bodies to Bulbous bodies (focusing on heat retention), and eventually to Cylindrical bodies (prioritizing heat retention, practicality, and cost-efficiency).; (4) the volume of mugs steadily increased from the early eighteenth century, generally classified into large volume (≥ 500 ml), medium volume (200-499 ml), and small volume (< 200 ml); (5) considering the extreme range of volume (11090 ml) and height (25 cm), it indicates that these two variables do not necessarily have a direct positive correlation; (6) the low center of gravity in handle design (average width of 3.4 cm against an average height of 9.9 cm for the body) reflects considerations for the distribution of liquid weight and operational convenience. The volume of sample-10 (11127 ml) notably exceeds the typical range for tea-drinking utensils, revealing the mechanism of wealth and status symbolism. Market demand orientation emerged as the primary driver for the evolution of export mug designs during the Ming and Qing Dynasties, with adjustments in the merchant system playing a secondary role. The transformation in mug design reflects the interplay of multiple factors, with the trend toward minimalist design being a response to market demands. [ABSTRACT FROM AUTHOR]

Study on export paintings has gradually shifted from artistic form to cultural connotation, with an emphasis on cross-cultural communication. Although the economic and social dimensions of their artistic value have been explored, few studies delve into the connection between Qing-era Guangzhou's trade culture and its color characteristics. Utilizing the HSV color model and the k-means algorithm, this study analyzes the color traits of 35 export paintings depicting Guangzhou landscapes and works from the "Thirteen-houses commercial zone," revealing Qing-era Guangzhou's urban impressions and Sino-Western artistic interactions. Key findings include: (1) the hue pixel range in Guangzhou export paintings primarily spans 10°–60° and 120°–250° (dominated by red and yellow-green), saturation values range from 1–82% (primarily low saturation), and value values range from 11–94% (with a wide variance); (2) compared to traditional Chinese paintings, the transformation from pure color (正色) → inter-color (间色) → projection-perspective and light source illustrates both the blending of Eastern and Western artistic cultures and a diminishing influence of traditional ceremonial culture; (3) in contrast with Western artworks, some Guangzhou export paintings display a Westernization trend in color structures, evident in vibrant colors and stark chiaroscuro contrasts. As bespoke art commodities, export paintings microscopically reflect Guangzhou's unique trade culture and socio-political dynamics. The shifts in color schemes, integration of realistic styles, and human-centric characteristics unveil the intricate interplay between quasi-realism and transcendental aesthetics in Qing-era Guangzhou, as well as the nuanced dynamics between social capital and art within a global trade network. [ABSTRACT FROM AUTHOR]

This article examines the changing role of the local government's environmental management in Guangzhou, China, through a historical content analysis of archival data. Environmental governance in Guangzhou has followed a government-led, top-down model. The content analysis showed that over the past four decades, the role of Guangzhou's municipal environmental governance has been characterized by transformation -- from passive responses to accelerating and securing economic growth, and finally to active interventions that balance economic growth and ecological protection. The changing role of the Guangzhou government in environmental governance is driven by varied urban political priorities at different historical stages. This article argues that the urban political economy and the national government's commitment to pragmatic, sustainable development shaped the local government's response to environmental problems. [ABSTRACT FROM AUTHOR]

Not only does language practice in shop signs generate a sense of place with particular meanings to visitors, it also indicates the kind of economic activity performed in that place. By investigating and comparing the shop name signs in the two largest foreign migrant neighbourhoods in Guangzhou, specifically, Baohan Straight Street (African community) and Yuanjing Road (Korean community), this study aims to reveal the distinctive economic patterns reflected by the two different linguistic landscapes and to shed new light on the relationship between linguistic landscape and economy. Quantitative and qualitative methods were employed to interpret the messages the shop name signs convey, including an examination of language choices and combinations as well as other visual resources used in the signs. The findings suggest that the foreign languages, namely, English and Korean, perform contrasting functions, with the former providing more practical information while the latter being more of an index of 'Korean authenticity'. The disparate linguistic landscapes in these two contexts emerge as an outcome of two specific economic patterns, namely, 'low-end globalisation' and 'symbolic economy'. [ABSTRACT FROM AUTHOR]

Urban commercial centers play a critical role in the development of cities, and it is of significant relevance to research the influencing variables of the urban vitality of commercial centers to improve the quality of urban commercial centers. This study employs big data to construct a multiple linear regression model in order to uncover the spatial-distribution characteristics of urban vitality and commercial sectors in commercial centers within the primary urban region of Guangzhou. The findings indicate that the commercial sectors of life, business, finance, and leisure have a substantial influence on the fluctuation of pedestrian flow in commercial centers throughout the day. Conversely, public service commercial sectors do not have a significant impact on pedestrian flow. Furthermore, the effect of various commercial sectors on the vibrancy of urban commercial centers varies, and their performance differs on weekdays and holidays. Additionally, the level of integration among commercial sectors affects the vitality of the city's commercial space. This research presents empirical facts that can be used to optimize the logical allocation of urban commercial resources in urban planning. [ABSTRACT FROM AUTHOR]

Abstract Objective Under the prevention and control measures of COVID‐19, the epidemiological situation of respiratory pathogens is not well known. Understanding the patterns of respiratory pathogens epidemiology under the prevention and control measures of COVID‐19 is important to guide resource allocation for existing and future treatment and prevention strategies. Methods In total, 659 fever outpatients nasopharyngeal swabs were collected at fever illness onset during June in 2022 at the First Hospital of Guangzhou Medical University. Swabs were tested by real‐time fluorescent single‐tube multiplex polymerase chain reaction (PCR) for 12 respiratory pathogens. Moreover, 108 of the 659 swabs were tested for influenza virus antigen. Results At least one pathogen was detected in 477 (72.38%) of 659 fever outpatients with multiple pathogens identified in 25 (3.79%). The highest multiple infectious pattern is parainfluenza virus in combination with influenza (five cases). Influenza A virus (IFA), human rhinovirus (HRV), and parainfluenza virus are the three leading virus pathogens with proportions of 64.64%, 5.01%, and 2.88%. School‐age children and adult groups have the highest pathogens positivity rate of 81.28% and 83.87%. Conclusion A high proportion of adolescents and adults has respiratory pathogens detected during fever illnesses during June in 2022 under the prevention and control of COVID‐19. These data indicate that diagnosis, prevention, and control of respiratory tract infection should be paid attention under the prevention and control of COVID‐19.

To provide diverse book lending channels and services to the public and to guide healthy competition in library industry, this paper discusses the coopetition relationship between online shared bookstores and libraries from the perspective of readers’ choice behavior. According to the questionnaire survey from 187 readers in Guangzhou, MNL model is adopted to quantitatively analyze the effect of various factors such as personal attributes, borrowing requirements and habits on readers’ choice. Research shows that online shared bookstore and library, mainly public library, have different competition in terms of multi-dimensional needs and preferences. Thus, this paper proposes the potential cooperation mode between online bookstore and library in collection, data and space, so as to promote the mutually beneficial coexistence between them. (Article content in Chinese with English extended abstract)

This paper examines the recent growth of government-led affordable housing in Guangzhou, addressing a paucity of global housing studies that explore experimental and contextual policy approaches in China. It also addresses the lack of Chinese housing studies recognizing the impact of housing design governance, including regulatory controls and design standards, on housing preferences, supply and lifestyles. Since 1995, the supply of affordable housing has surged, now surpassing that of market housing for the first time. This response to failures in the private housing market and a lack of equitable access to housing signifies a significant shift, acknowledging the need to re-establish a state-led and long-term public housing supply after decades of housing marketization. Employing an architectural design research perspective, this paper investigates the interplay between affordable housing supply and the emergence of housing standards, examining resulting housing design outcomes. It poses the question: What changes in housing policy and interventions in housing markets are necessary to increase public rental housing supply, and how do these changes affect housing outcomes? The paper explores these questions through a discussion of the key moments in affordable housing policy and housing estate development in Guangzhou that facilitated the creation of widely accessible public housing and long-term housing assets. This provides new insights into China’s unique approach to translating central government social welfare and housing policy through contextual design experimentation and pilot housing projects, departing from the conventional top-down policy implementation found in most other countries.

Analyzing the trajectory and mechanism of rural industrial change is important for understanding urban–rural integration and facilitating rural revitalization. Based on the data of industrial enterprises in 1112 administrative villages of Guangzhou, China, from 1978 to 2020, we identify the evolution trend of rural industry by investigating the spatial–temporal dynamics of industrial changes in rural areas. An extended triple-process framework incorporating urbanization and greenization was employed to unravel the underlying mechanism of the trajectory of rural industrialization. The results highlight the transformation from rural to suburban industrialization. In the past twenty years, rapid urbanization has contributed to the establishment of development zones. The agglomeration economy has led to a higher concentration of manufacturing industries in these development zones rather than rural areas. The eco-friendly development has resulted in a green transition in rural areas, further restricting the growth of traditional rural industries. Our analysis provides a nuanced picture of Guangzhou’s spatial–temporal dynamics of rural and suburban industrialization. Meanwhile, it emphasizes the importance of urbanization and greenization in explaining the recent transformation of industrialization in China.

Ancient trees play an important ecosystem service role in high-density cities, revealing the zonal distribution characteristics of vegetation under climate influence. The ancient trees in Guangzhou and Foshan in 2018 and 2023 were taken as study objects to explore the evolution of their spatio-temporal patterns and to analyze the spatial differentiation characteristics of their driving factors using the geographical weighted regression (GWR) model. The results showed the following: (1) The ancient trees in Guangzhou and Foshan were composed of typical subtropical evergreen broad-leaved forest communities, mainly represented by broad-leaved species of evergreen dicotyledonous plants. The dominant species mainly included Litchi chinensis, Ficus microcarpa, Canarium pimela, Ficus virens, and Dimocarpus longan. However, there was a significant difference between Guangzhou and Foshan. (2) The number of ancient trees in Guangzhou showed negative growth, while Foshan saw a significant increase. However, species diversity in both areas increased, with the highest diversity in the northeast, higher diversity in the south-central part, and lower diversity in the western and northwestern parts. (3) The maximum kernel density of ancient trees in Guangzhou and Foshan differed 22-fold, indicating a spatial distribution pattern of multiple clusters. (4) The GWR model effectively explained the driving factors of the heterogeneity of the spatial distribution of ancient trees. The results showed that artificial disturbance was the most important factor affecting the spatial distribution of ancient trees in high-density urban agglomerations in the same vegetation zone. The study clarified the characteristics of the spatial distribution and species diversity of ancient trees in the region, revealed the driving factors for the evolution of the spatial pattern of ancient trees in highly urbanized areas, and provided guidelines for policies and measures for enhancing biodiversity and conserving germplasm resources in the region.

How do the manifestations of deportability in everyday life and deportation experiences constitute African migrants into a "deportspora" in China? Despite the scholarly attention paid to the migration of Africans to China, questions of deportability and the simultaneous, reverse flows through their deportation are under-explored. In this article, I examine this critical gap by exploring the lifeworlds of Nigerian migrants and deportees from China, using data from two separate studies conducted in 2017 and 2020-2021. Nigerians are exposed to "illegalization," experience deportability threats, and become vulnerable to arrest and re-dispersal as deportees. The realities of being undocumented and overstaying, the social act of running, and the host society's instrumentalization of deportation to regulate or order the migrant community all point to the existence of Nigerian deportspora in China. The import of this form of social formation makes deportability and deportation an essential part of social life in the African migrant community in the Chinese city of Guangzhou. The article advances critical debates in deportation studies, especially in the under-researched context of Sino-African migrations. [ABSTRACT FROM AUTHOR]

This study assessed the regional differences of PM2.5 (fine particulate matter) concentration and secondary components in China. Through chemical analysis (Thermal/Optical Carbon Analyzer and ion chromatography) and statistical tools (SPSS and Origin software), PM2.5 samples' concentration and main components were estimated and compared in Tianjin and Guangzhou in December 2016. The average PM2.5 mass concentration was 148 μg/m3 in Tianjin and 62 μg/m3 in Guangzhou, indicating heavy air pollution in both cities. Organic carbon constituted 15% of PM2.5 in Tianjin, while that accounted for 25% in Guangzhou. The concentration of the secondary organic carbon accounted for 40% and 33% of organic carbon in Tianjin and Guangzhou, respectively. The ionic components in Tianjin made up 49% of PM2.5, while those of Guangzhou were responsible for 36% locally. The sulfate oxidation ratio reached 0.41 in Tianjin and 0.53 in Guangzhou while the nitrate oxidation ratio was 0.23 and 0.14 in the two cities, respectively. These results indicated high secondary conversion rate in PM2.5 pollution in both cities and suggested that PM2.5 mass concentration could not fully reflect its environmental and health effects, and so more attentions should be paid to the effects of its components, especially secondary components. In addition, the results could provide a scientific basis for making policies concerning air pollution control and developing strategies of air quality improvement. [ABSTRACT FROM AUTHOR]

Given the complex interplay between economic and cultural–historical factors, this paper explores scene perception and its mechanism in individual and collective cognition of historical commercial streets. Based on a perception model constructed from scene theory, the study utilizes user scene experience feedback from Beijing Road, a commercial pedestrian street in Guangzhou. It conducts a systematic assessment using hierarchical analysis (AHP) across three dimensions: authenticity, theatricality, and legitimacy. The findings reveal the following: (1) according to visitors, traditional cuisine, cultural and creative arts, and Lingnan's intangible cultural heritage received low ratings; (2) historical relics and traditional cuisine are dominant factors, highlighting public attention to cultural heritage, but the role of historical–cultural characteristics and festival activities is relatively marginalized; (3) cultural–historical relics and traditional cuisine are the leading factors that contribute to an authentic experience, while historical context and festival activities constitute secondary factors; (4) cultural landscapes and arts are central to theatrical experiences, with modern visual elements playing a lesser role; (5) diversified commercial formats and public services are the core factors influencing legitimacy experience, reflecting the role of market diversity and policy orientation in building consumer trust. The design of historical and cultural streets should prioritize the preferences of those experiencing them to promote cultural identity and historical continuity. Additionally, the synergy between commercial diversity and policy orientation should be strategically emphasized to form a business ecosystem supporting sustainable development. Future commercial street renewals should focus on the key role of visual narrative in shaping brand culture. This paper offers insights into the dynamic process of constructing scene experience from perspectives of spatial materialization and emotional empowerment to cultural identity, providing references for strategies in historical place renewal. [ABSTRACT FROM AUTHOR]

This paper examines the recent growth of government-led affordable housing in Guangzhou, addressing a paucity of global housing studies that explore experimental and contextual policy approaches in China. It also addresses the lack of Chinese housing studies recognizing the impact of housing design governance, including regulatory controls and design standards, on housing preferences, supply and lifestyles. Since 1995, the supply of affordable housing has surged, now surpassing that of market housing for the first time. This response to failures in the private housing market and a lack of equitable access to housing signifies a significant shift, acknowledging the need to re-establish a state-led and long-term public housing supply after decades of housing marketization. Employing an architectural design research perspective, this paper investigates the interplay between affordable housing supply and the emergence of housing standards, examining resulting housing design outcomes. It poses the question: What changes in housing policy and interventions in housing markets are necessary to increase public rental housing supply, and how do these changes affect housing outcomes? The paper explores these questions through a discussion of the key moments in affordable housing policy and housing estate development in Guangzhou that facilitated the creation of widely accessible public housing and long-term housing assets. This provides new insights into China's unique approach to translating central government social welfare and housing policy through contextual design experimentation and pilot housing projects, departing from the conventional top-down policy implementation found in most other countries. [ABSTRACT FROM AUTHOR]

Background: Human respiratory syncytial virus (RSV) is a leading cause of acute lower respiratory tract infection and hospitalization, especially in children. Highly mutagenic nature and antigenic diversity enable the RSV to successfully survive in human population. We conducted a molecular epidemiological study during 2017–2021 to investigate the prevalence and genetic characteristics of RSV. Methods: A total of 6499 nasopharyngeal (NP) swabs were collected from hospitalized children at Department of Pediatrics, Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou, Guangdong, China. All NP swab specimens were preliminary screened for common respiratory viruses and then tested for RSV using specific PCR assays. Partial G genes of RSV were amplified for phylogenetic analysis and genetic characterization. Results: The overall detection rate for common respiratory viruses was 16.12% (1048/6499). Among those, 405 specimens (6.20%, 405/6499) were found positive for RSV. The monthly distribution of RSV and other respiratory viruses was variable, and the highest incidence was recorded in Autumn and Winter. Based on the sequencing of hypervariable region of G gene, 93 RSV sequences were sub-grouped into RSV-A (56, 60.2%) and RSV-B (37, 39.8%). There was no coinfection of RSV-A and RSV-B in the tested samples. Phylogenetic analysis revealed that RSV-A and RSV-B strains belonged to ON1 and BA9 genotypes respectively, indicating predominance of these genotypes in Guangzhou. Several substitutions were observed which may likely change the antigenicity and pathogenicity of RSV. Multiple glycosylation sites were noticed, demonstrating high selection pressure on these genotypes. Conclusion: This study illustrated useful information about epidemiology, genetic characteristics, and circulating genotypes of RSV in Guangzhou China. Regular monitoring of the circulating strains of RSV in different parts of China could assist in the development of more effective vaccines and preventive measures. [ABSTRACT FROM AUTHOR]

Strategic spatial planning plays a pivotal role in effectively providing solutions for urban issues. In 2000, Guangzhou took the pioneering step of formulating China's first strategic spatial plan, known as the Guangzhou Strategic Plan. However, existing research has predominantly focused on the content of the "Guangzhou Strategic Spatial Plan" while lacking attention to its implementation effects. To address this empirical gap, this paper analyzes Guangzhou's current spatial structure from the perspectives of facilities, population, and industry. The results reveal that: (1) the effectiveness of the "Southern Expansion" strategy outlined in the Guangzhou Strategic Spatial Plan has been limited. It has not achieved the expected results in terms of facility construction, population attraction, industrial clustering, and value-added growth; (2) due to inherent limitations and a lack of planning support, the development of the new town presents a dilemma. Considering the current spatial structure, this paper reflects on the reasons for the failure of Guangzhou's strategic spatial planning, aiming to provide insights for the implementation of a new round of strategic spatial planning. [ABSTRACT FROM AUTHOR]

Zinc is one of human essential metals. In this study, 101 kinds of daily food for residents, including vegetables, aquatic food, meat, fruits, rice and cereal products, pulse food, dairy products and eggs, were collected at various agricultural markets and supermarkets in Guangzhou city, China, and their zinc contents were determined. The results showed oyster is most abundant in zinc (703.5 ± 25.6 mg/kg), followed by high-zinc milk powder (58.63 ± 0.90 mg/kg), pulse food, mutton, beef and pig liver with zinc contents above 30 mg/kg. The zinc contents of rice and cereal products, milk powder, poultry, pork, some aquatic food and eggs are also relatively high (>10 mg/kg), while vegetables and fruits have zinc contents significantly below 10 mg/kg. The daily zinc intake per person was determined by considering the zinc content of various food types and the dietary habits of specific demographic groups, resulting in 12.3 mg/day for the normal person, 11.2 mg/day for low-income individual, 12.3 mg/day for middle-income individual, 13.3 mg/day for high-income individual, 10.2 mg/day for older individual, 12.9 mg/day for factory worker, 11.5 mg/day for college student, and 8.4 mg/day for kindergarten child. The reference values of zinc intake recommended by the Chinese Nutrition Society were used to evaluate the zinc intake of Guangzhou residents, showing that the residents’ zinc intake is generally sufficient and not necessary to use zinc supplementation. Income, age and occupation could have posed influence on dietary intake of zinc.

Abstract Background Cervical cancer is associated with high‐risk human papillomavirus (HR-HPV) infection in the world. We aimed to evaluate the status of HPV infection among women in Guangzhou, China. Methods The study recruited 28,643 female patients from the Guangzhou Women and Children’s Medical Center for HPV genotype testing between 2019 and 2021. Results 5668 patients were infected with HPV, resulting in an overall infection prevalence of 19.78%. The prevalence of HR-HPV was recorded at 13.94% (both single-infections and multi-infections), probably high-risk HPV/possibly carcinogenic (pHR-HPV) as 3.51%; and low-risk HPV (LR-HPV) as 3.56%. The most common HR-HPV genotype detected was HPV-52 with an infection rate of 4.99%, followed by HPV 58 (2.18%), 16 (2.12%), 51 (1.61%), 39 (1.19%), 56 (1.09%), 59 (0.85%), 18 (0.72%), 33 (0.61%), 31 (0.53%), 35 (0.20%), 45 (0.17%). Among LR-HPV genotypes, HPV-42 was the most common (1.08%), followed by 44 (0.77%), 81 (0.68%), 6 (0.48%), 43 (0.40%), 11 (0.23%) and 83 (0.07%). The prevalence of infection among different genotypes in pHR-HPV was: 68 (1.29%), 53 (1.21%), 66 (0.77%), 82 (0.25%), 73 (0.16%). Additionally, the prevalence of single genotype HPV infection exceeded that of multiple HPV infections except HPV-59. Conclusion Our findings imply that HPV genotype infections in Guangzhou demonstrate a regional and age-related distribution. Therefore, these data can provide a substantial foundation for further epidemiologic analysis to control and prevent HPV infections in Guangzhou.

This study employed a three-layer urban fabric analysis method based on Space Syntax techniques to analyze the spatial distribution of the Zhengyi 正一 Namo Daoguans (Nahm-mouh Daoist halls 喃呒道馆) in Guangzhou City during the Republic of China era in quantitative and qualitative ways. We investigated their relationships with physical geographic elements, population numbers, the spatial distribution of local temples, cultural practices, and urban topological spaces, which reflected the complexity and flexibility of their distribution patterns, as well as the marginal, commercial nature of the ritual industries they operate. Meanwhile, compared to other influencing urban factors, the Normalized angular choice (NACH) of urban streets plays a decisive role in the spatial distribution of most Namo Daoguans. The locations of Namo Daoguans were mainly chosen on the streets that people passed through most often, and the travel distance within 750 meters (about 10 minutes walking distance) could nearly encompass all Namo Daoguans. Finally, we summarize the logic and pattern of site selection for the Namo Daoguans in Guangzhou at that time. These new findings deepen the current understanding of related knowledge and provide a basis for future planning and design assessment of related spaces.

Rapid urbanization in China has shifted the logic and needs of rural resource allocation, prompting a transformative approach toward rural revitalization and sustainable development through comprehensive land consolidation. This paper offers a theoretical framework for understanding the driven adjustments in rural power, capital, and social structures facilitated by comprehensive land consolidation. It discusses how the construction of pastoral complexes influences the diversification of rural land use and ecological restoration through dynamic adjustments in power structures. This study illustrates that in Guangzhou, comprehensive land consolidation is indispensable for ensuring food security and fostering diverse rural industries. Furthermore, it facilitates the resource and commercialization of land, balances governmental social responsibilities with rational capital pursuits, and enriches the livelihood structures of social entities to ensure rural social equity. The pastoral complex model achieves a harmonious integration of rural socio-economic and natural systems. Innovations in paths of social participation help eliminate the effects of social inequality within the environment, while the theory of political ecology clearly analyzes the internal reasons for the interaction and strategic plays among diverse actors under this model. The case studies of the pastoral complex present the practice of national–capital–land–social relationships and changes in land benefits, showcasing a Chinese approach to rural development and social justice. This provides a new perspective for political ecology research and enriches its empirical content.

Population aging is a global issue. China is facing the same challenge, especially in its megacities, with more than 10 million permanent urban residents. These densely populated cities urgently need the scientific planning and optimization of the layout of service facilities for older people. Taking Guangzhou, a megacity in China, as an example, this study uses point-of-interest (POI) data and the ID3 machine learning decision tree algorithm to train a site selection model for service facilities for older people. The model can help to select appropriate locations for new service facilities for older people more scientifically and accurately, and it can provide targeted suggestions to optimize the layout of the service facilities for older people in Guangzhou. First, Guangzhou city is divided into 29,793 grids of 500 m × 500 m based on the range of activities of older people, and 985 grids are found to contain service facilities for older people. Then, the POI data of the grid are fed into the ID3 algorithm for training to obtain a prediction model for the selection of sites for service facilities for older people. The effective prediction rate of the model reaches 87.54%. Then, we apply the site selection model to predict the whole city of Guangzhou, and 4534 grids are suitable for service facilities for older people. In addition, considering the degree of concentration of the elderly population in each street, we further filter out 1066 priority grids as the final site selection. Finally, taking into account the situation of the streets in different districts, we propose several strategies to optimize the layout of the construction of service facilities for older people.

This research investigates environmental inequalities within Guangzhou’s Huangpu District against the backdrop of rapid urbanisation and industrial expansion in Asia. This study identifies environmental hotspots, particularly in socially vulnerable areas characterised by high industrial density, using a vulnerability framework and analysing census and pollution data. Utilising satellite imagery, urban planning documents, and field research, we delve into the internal environmental conflicts arising from industrial land use. Our findings reveal how diverse stakeholders, guided by their rationales and interests, collectively contribute to spatial inequalities within a market-driven context. Importantly, we emphasise that environmental inequality transcends mere conflicts of interest among stakeholders and is fundamentally shaped by the prevailing market-oriented spatial development model in peri-urban areas. This model results in urban segmentation, socio-economic stratification, and an uneven distribution of environmental risks and resources. Our study advocates for a paradigmatic shift in China’s peri-urban spatial development and the integration of environmental protection and social equity alongside economic growth. We recommend moving away from short-term speculative practices and promoting long-term, community-engaged urban renewal strategies that harmonise economic progress with improved living standards and environmental sustainability.

This study examines empirically the impacts of geomantic attributes on housing prices in Guangzhou. Using second-hand housing transaction data from one Guangzhou’s largest second-hand transaction agency, we construct a hedonic price model to analyze the determinants of housing purchase behavior. We find that unfavorable geomantic attributes, such as proximity to graveyard, funeral parlor, hospital, slaughterhouse, and highway, have significant negative effects on housing prices. However, favorable geomantic attribute close to the Pearl River has a significant positive impact on housing prices. Lucky floor numbers and lucky address numbers are also found to be capitalized into housing prices. Moreover, we find that the demand for housing improvement as housing purchase motivation is an important channel to determine which of geomantic attributes are unfavorable when residents have higher living requirements ll presente contributo esamina, attraverso un’analisi em- pirica, l’effetto degli attributi geomantici sui prezzi degli immobili a destinazione residenziale a Guangzhou. A partire dalle informazioni relative alle transazioni di immobili non di nuova costruzione di una delle più grandi agenzie di compravendite immobiliari i Guangzhou, è stato sviluppato e validato un modello di valutazione secondo l’approccio dei prezzi edonici per analizzare i fattori che determinano i comportamenti e le strategie di acquisto degli acquirenti di immobili a destinazione residenziale. I risultati indicano che gli attributi geo- mantici sfavorevoli, come la vicinanza a cimiteri, pompe funebri, ospedali, macelli e autostrade, hanno un effetto negativo sul prezzo delle abitazioni. Viceversa, gli attributi geomantici favorevoli, come la vicinanza al fiume Pearl, hanno un effetto positivo sul prezzo delle abita- zioni. Similmente, emerge, ceteris paribus, una disponibilità a pagare un prezzo maggiore per immobili che siano ubicati a un livello di piano o a un civico espressione di numeri considerati fortunati nella cultura tradizionale cinese, come ad esempio il numero 8. Dalle ana- lisi emerge, inoltre, che in particolare alcuni attributi geomantici influenzano in maniera determinante la do- manda di alloggi di migliore qualità espressa da acquirenti che abbiano esigenze e aspettative più elevate.

Abstract Purposes To investigate health-related quality of life (HRQoL) of patients with knee osteoarthritis (KOA) in Guangzhou, China, and examine its association with selected sociodemographic characteristics as well as knee function. Methods This multicenter cross-sectional study included 519 patients with KOA in Guangzhou from April 1 to December 30, 2019. Data on sociodemographic characteristics were obtained using the General Information Questionnaire. The disability was measured using the KOOS-PS, resting pain using the Pain-VAS, and HRQoL using the EQ-5D-5L. The association of selected sociodemographic factors, KOOS-PS and Pain-VAS scores with HRQoL (EQ-5D-5L utility and EQ-VAS scores) were analyzed using linear regression analyses. Results The median (interquartile range [IQR]) of EQ-5D-5L utility and EQ-VAS scores were 0.744 (0.571–0.841) and 70 (60–80) respectively, lower than the average HRQoL in the general population. Only 3.661% of KOA patients reported no problems in all EQ-5D-5L dimensions, with Pain/Discomfort being the most frequently affected dimension (78.805%). The correlation analysis showed that the KOOS-PS score, Pain-VAS score and HRQoL were moderately or strongly correlated. Patients with cardiovascular disease, no daily exercise, and high KOOS-PS or Pain-VAS scores had lower EQ-5D-5L utility scores; and patients with body mass index (BMI) > 28 ,high KOOS-PS or Pain-VAS scores had lower EQ-VAS scores. Conclusions Patients with KOA had relatively low HRQoL. Various sociodemographic characteristics as well as knee function were associated with HRQoL in regression analyses. Providing social support and improving their knee function through methods such as total knee arthroplasty might be crucial to improve their HRQoL.

IntroductionGiven the rapid geographic spread of dengue and the growing frequency and intensity of heavy rainfall events, it is imperative to understand the relationship between these phenomena in order to propose effective interventions. However, studies exploring the association between heavy rainfall and dengue infection risk have reached conflicting conclusions, potentially due to the neglect of prior water availability in mosquito breeding sites as an effect modifier.MethodsIn this study, we addressed this research gap by considering the impact of prior water availability for the first time. We measured prior water availability as the cumulative precipitation over the preceding 8 weeks and utilized a distributed lag non-linear model stratified by the level of prior water availability to examine the association between dengue infection risk and heavy rainfall in Guangzhou, a dengue transmission hotspot in southern China.ResultsOur findings suggest that the effects of heavy rainfall are likely to be modified by prior water availability. A 24–55 day lagged impact of heavy rainfall was associated with an increase in dengue risk when prior water availability was low, with the greatest incidence rate ratio (IRR) of 1.37 [95% credible interval (CI): 1.02–1.83] occurring at a lag of 27 days. In contrast, a heavy rainfall lag of 7–121 days decreased dengue risk when prior water availability was high, with the lowest IRR of 0.59 (95% CI: 0.43–0.79), occurring at a lag of 45 days.DiscussionThese findings may help to reconcile the inconsistent conclusions reached by previous studies and improve our understanding of the complex relationship between heavy rainfall and dengue infection risk.

As an upper-middle-income country, China has a vast territory, a large population and substantial variations in the nature of mental health service provision. Guangzhou, one of the five biggest cities in China, is considered as indicative of the current development of mental health services in a more economically developed part of China. In this paper, we first introduce mental health services in Guangzhou and their historical development: from the rising development of mental health care (1949 to the mid-1960s), the stagnant development period of the psychiatric hospitals (1966–1976), the rapid development period of the psychiatric hospitals (1978 to the 1990s), to the integrated development period of community mental health care (2000–2020). This historical trajectory partly reflects the development of mental health services across China. Second, from the public health perspective, we introduce the current mental health care delivery system and resources in Guangzhou, including the psychiatric specialist hospitals, psychiatric units of general hospitals, and community mental health care. Third, based on the current mental health service system, we highlight community mental health care in Guangzhou. We will describe these elements of the mental health system under the following headings: organizational setup, management, and services. We also explore the design of community mental health service models and the challenges in the post-covid-19 era. Finally, we provide considerations and recommendations for mental health service delivery in Guangzhou in the future.

Background: Cervical cancer is associated with high‐risk human papillomavirus (HR-HPV) infection in the world. We aimed to evaluate the status of HPV infection among women in Guangzhou, China. Methods: The study recruited 28,643 female patients from the Guangzhou Women and Children's Medical Center for HPV genotype testing between 2019 and 2021. Results: 5668 patients were infected with HPV, resulting in an overall infection prevalence of 19.78%. The prevalence of HR-HPV was recorded at 13.94% (both single-infections and multi-infections), probably high-risk HPV/possibly carcinogenic (pHR-HPV) as 3.51%; and low-risk HPV (LR-HPV) as 3.56%. The most common HR-HPV genotype detected was HPV-52 with an infection rate of 4.99%, followed by HPV 58 (2.18%), 16 (2.12%), 51 (1.61%), 39 (1.19%), 56 (1.09%), 59 (0.85%), 18 (0.72%), 33 (0.61%), 31 (0.53%), 35 (0.20%), 45 (0.17%). Among LR-HPV genotypes, HPV-42 was the most common (1.08%), followed by 44 (0.77%), 81 (0.68%), 6 (0.48%), 43 (0.40%), 11 (0.23%) and 83 (0.07%). The prevalence of infection among different genotypes in pHR-HPV was: 68 (1.29%), 53 (1.21%), 66 (0.77%), 82 (0.25%), 73 (0.16%). Additionally, the prevalence of single genotype HPV infection exceeded that of multiple HPV infections except HPV-59. Conclusion: Our findings imply that HPV genotype infections in Guangzhou demonstrate a regional and age-related distribution. Therefore, these data can provide a substantial foundation for further epidemiologic analysis to control and prevent HPV infections in Guangzhou. [ABSTRACT FROM AUTHOR]

Night tourism often involves a large number of lighting facilities, which consume a large amount of energy. Therefore, one of the unique low energy consumption natural ecological tourism activities -- firefly night tour has attracted attention and become an important breakthrough point for night tourism in tourist destinations. In this paper, Guangzhou firefly night tour project is taken as the research object. Based on the comprehensive economic, environmental, and socio-cultural benefits brought by the development of firefly night tour, the resources distribution, current development status, and existing problems of firefly night tour in Guangzhou are analyzed, and its high-quality development paths are proposed from three levels: government, industry, and tourist. The aim is to explore a new model for the economic development of Guangzhou night tour, boosting the transformation and upgrading of the night tourism economy, while also providing reference ideas and value for the development of night tourism economy in other tourist destinations. [ABSTRACT FROM AUTHOR]

This article analyzes photographs of the city of Nanjing collected in the last years of the nineteenth century by Robert Löbbecke (1852–1910), a German military captain and engineer working in service of Chinese military reforms by leaders of the Self-Strengthening Movement. Spanning almost three decades and including the earliest known dated photos of Nanjing, more than half of the large albumen prints in this collection can be attributed to Chinese photographers, including the local branch of Ouyang Shizhi's (1857–1932) Powkee studio. They offer rare insights into both the early work by this famous studio and early Chinese photography of place, focusing on a city that stood at the center of struggles over China's political and economic survival. As such, this collection offers exceptional terrain to explore relations of photography to place, identity, and power in nineteenth-century China. To unpack these relations, I analyze Löbbecke's collection as part of photography's multivalent encounters with the city in nineteenth-century China. I start with the photographic encounters with the Chinese city in the work and writings of Jules Itier (1802–1877) and John Thomson (1837–1921), and then explore what the Löbbecke collection reveals about the visions its photos made possible for their expatriate collector and for their Chinese makers and audiences, with a special focus on Ouyang Shizhi's Nanjing studio enterprise. I conclude with a reflection on a more recent moment when the photos collected by Löbbecke returned home a century after their making to participate in the telling of new kinds of urban histories. [ABSTRACT FROM AUTHOR]

This paper presents a comprehensive analysis of digitized specimen data and relevant literature to investigate the vascular plant diversity in Guangzhou City, China. Specimen data were collected from various sources, including the China Digital Herbarium (CVH), the National Specimen Resource Sharing Platform (NSII), Global Plants on JSTOR, and the Global Biodiversity Information Facility (GBIF). Following data standardization, the study identified 41,890 vascular plant specimens, encompassing 248 families, 1563 genera, and 4536 species, including subspecies and cultivated plants. Among them, the native plants of Guangzhou city accounted for 60.6% of the species. The temporal analysis identified three distinct peaks in specimen collection: 1916–1920, 1928–1936, and 1950–1964. Collection activities were primarily concentrated between the months of April and November. The distribution of collected specimens exhibited significant variation among different species, with families such as Fabaceae, Poaceae, and Myrtaceae having the highest number of specimens. Similarly, genera such as Eucalyptus, Ficus, and Citrus were well-represented. The most frequently collected species included Litchi chinensis, Eucalyptus robusta, and Cycas taiwaniana. Remarkably, 21 species had specimen counts exceeding 100. Unfortunately, approximately three-quarters of the species had fewer than 10 recorded specimens. Alarmingly, 1220 species were represented by only one specimen. Geographically, the majority of specimens originated from the former suburbs of Guangzhou, Conghua Delta Mountain, and Liuxi River areas, while other regions had limited representation. In terms of specimen collections, the Herbarium of South China Botanical Garden of the Chinese Academy of Sciences (IBSC) recorded the highest number of specimens (13,828 specimens), followed by the Tree Herbarium of South China Agricultural University (CANT; 3869 specimens) and the Herbarium of Sun Yat-sen University (SYS; 3654 specimens). The collection history in Guangzhou spans nearly 300 years and can be broadly divided into two distinct periods. The first period extends from the late 13th century to 1949, primarily encompassing the collection efforts of foreign visitors in Guangzhou, and represents the pioneering phase of plant taxonomy research in China. The second period, from 1949 to the present, is characterized by extensive investigations and collection activities conducted by local scholars, with a specific emphasis on native plant resources. By meticulously organizing and verifying information derived from historical documents and specimens, the paper effectively summarizes the plant collection and research history of Guangzhou, providing detailed profiles of the key collectors. These findings furnish reliable historical reference materials for the study of plant taxonomy and diversity in Guangzhou. [ABSTRACT FROM AUTHOR]

Urban parks, one of the most significant outdoor leisure areas, are particularly important for the physical and mental health of older adults. In order to investigate the benefits and constraints of leisure activities that older adults perceived in urban parks, as well as their negotiation mechanisms, this study was conducted using a qualitative method, interviewing 102 retired older adults aged 55 or older in Guangzhou, China, and using Rost CM 6.0 for word frequency analysis. The study findings indicated that due to the lack of age-friendly public leisure facilities in Guangzhou, Chinese older adults expressed multiple expectations regarding the benefits of urban parks, mainly in terms of physical, psychological, and social interaction, with physical benefits being their primary drivers. Leisure constraints can be intrapersonal, interpersonal, or structural. Older adults who visited parks and those who did not were affected by different levels of limitations, with the oldest people experiencing the most pronounced constraints. Older adults were able to access leisure opportunities through a variety of constraint negotiation strategies, including cognitive adaptability, spatiotemporal adaptation, interpersonal coordination, skill acquisition, and alternative leisure activities. The results of this study might assist related management departments in building more age-friendly parks based on the framework of the benefits and constraints of park recreation for older adults, in terms such as institutional design and planning to enhance the role of urban parks in healthy aging. [ABSTRACT FROM AUTHOR]

Wetlands play a crucial role in sustaining the health of Earth's ecosystems, and wetland parks represent vital manifestations of wetlands, serving various functions in both urban and suburban areas. These parks not only provide essential ecological security, promote regional biodiversity, but also offer opportunities for leisure activities. Evaluating the landscape of wetland parks is invaluable in guiding their future development and supporting related eco-tourism initiatives. However, the rapid urbanization in the Pearl River Delta of southern China presents both challenges and opportunities for wetland parks in this area. Evaluation of wetland in this area has not received sufficient attention in academia. Therefore, this study aims to review landscape assessment techniques and explore the possibility of combining them with spatial technologies in this field. This paper introduced Geographic Information System (GIS) and the Analytic Hierarchy Process (AHP) as tools for analyzing wetland data. Landscape indices were selected based on previous research. A comprehensive wetland evaluation system was developed for the Tianhe Wetland Park in China, encompassing geographic, environmental, and social dimensions, which were investigated through fieldwork, experiment, and questionnaires to support the assessment process. Expert opinions were gathered to determine the significance of each metric in the system. Through data digitalization, rasterization, reclassification, and index calculation, the resulting values were reflected on an overall map. These findings allow for the analysis of relationships among landscape indices, thereby providing valuable insights for policymakers, managers, and stakeholders involved in the future development of wetland parks in this region. [ABSTRACT FROM AUTHOR]