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With the continuous advancement of urbanization in China, the area of forests, fields and lakes have been decreasing. Some cities face two problems which are waterlogging and water shortage. How to deal with water ecological problems? Experts and scholars have proposed to build “sponge city” and make full use of rivers, lakes, buildings, roads, green spaces to form a complete sponge which has good flexibility in responding to environmental changes and natural disasters. This paper analyzes the successful cases of sponge city construction in Potsdamer Platz in Berlin, Germany and Pingxiang City. It analyzes the necessity of building a sponge city in the northern region from alleviating water shortage, preventing flood disasters, strengthening water ecological civilization construction and improving urban drainage infrastructure. It also proposed "zoning management, system construction, policy support."

Using digital technology and artificial intelligence to improve the level of municipal solid waste management and to explore the new path orientation of urban management with Chinese characteristics is an important and key task of smart city construction. There are many similarities between Russia and China in urban construction, economic development and so on, so the experience of municipal solid waste management is of great significance to China’s urban construction. This paper analyzes the basic situation and reform process of Russian municipal solid waste, investigates the practice of Russian municipal solid waste management in the process of smart city construction, and sums up its successful experience on this basis, combined with the present situation of Shenyang, this paper puts forward some suggestions on the treatment of municipal solid waste under the background of the construction of smart city.

The rural dwelling house is not only an important component of housing construction in China, but also significant of promotion of the construction socialism new countryside. With the rapid development of urbanization of rural China, the level of urbanization in China will be close to 60% excepted by 2020, which undoubtedly bring to the rural building industry an unprecedented opportunity for development. The main problem which rural building materials faced is lack of the product performance certification. According to characteristic of customers and tendency of building material industry, the rural building materials should possess the harmonization, except basic quality performance. This paper analyzed the factors which influence on the environmental harmonization and established a fuzzing evaluation model, based on life cycle assessment. Through validation of environmental harmonization of ceramic, fuzzing evaluation method was effective and feasible to assess the rural building material environment harmonization.