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Background Chinese aging population degree will transform mild to moderate. During addressing aging issues by proactive national strategies and healthy aging strategies, the sleep health of older peoplecannot be ignored. Objective To explore the effect of working after retirement on sleep quality in Chinese older people, providing relevant reference data for improving sleep quality in this group of people. Methods In August 2021, data of working after retirement prevalence and sleep health in subjects aged ≥60 years (n=7 862) were obtained from the 2018 China Family Panel Studies (CFPS) conducted by Peking University with permission. They were divided into working after retirement and non-working after retirement groups by working after retirement prevalence. Normal sleep duration (within 4 to 10 hoursper night) , abnormal sleep duration (≤4 or ≥10 hours per night) , sleeping late (going to bed after 23 o'clock) in accordance with relevant diagnostic criteria used in international studies on sleep health in middle-aged and older people. Self-reported perceptions of sleep quality were classified into optimistic and pessimistic according to subjective evaluation of sleep efficiency and effect. Binary Logistic regression model was used to explore the effect of working after retirement on sleep duration, perception of sleep quality and the time to go to sleep. Results Among the subjects, 5 705 (72.56%) had optimistic sleep quality, 6 508 (82.78%) had normal sleep duration, and 7 464 (94.94%) went to sleep earlier than 23: 00, and 4 005 (50.94%) still worked after retirement. After controlling for age, gender, maritalstatus, education level, personality traits and other factors, working after retirement was associated with increased probability of higher optimism with sleep quality〔OR (95%CI) =1.205 (1.069, 1.358) 〕, more normal sleep duration〔OR (95%CI) =1.306 (1.137, 1.499) 〕, and earlier time to go to sleep〔OR (95%CI) =1.596 (1.253, 2.033) 〕.Working after retirement was associated with increased probability of good sleep quality (P

The reinforced part at the bottom of high-rise assembled monolithic concrete shear wall structures generally uses cast-in-place concrete due to high elastic–plastic deformation capacity requirements, which limits the advantages of prefabricated shear wall structures. This study investigates the feasibility of using cluster connections to assemble integral shear wall structures at the bottom by modifying the vertical reinforcement of the cluster connection. Numerical simulations using ABAQUS (Version 2019) were validated with laboratory test results. The seismic performance of prefabricated shear walls with cluster connections was examined under varying axial compression ratios. Results indicate that the prefabricated shear wall demonstrates higher bearing and deformation capacity compared to cast-in-place shear walls. The degradation of strength and equivalent stiffness in prefabricated walls is slower, showing better seismic performance under higher axial compression ratios. The cluster connection ensures effective force transmission, maintaining wall integrity. After optimization, the prefabricated shear wall with cluster connection meets the expected seismic performance, providing a basis for its application in reinforced bottom sections. [ABSTRACT FROM AUTHOR]