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As the basic unit of a city, community is an important carrier of residents' healthy life. With the development of society, the environmental status of old communities has been unable to meet the needs of residents' healthy life, and it is urgent to optimize the community environment. The emergence of novel coronavirus also put forward more strict requirements for the grassroots governance of old communities in China. Taking Fuguoli community in Beijing City as an example, the problems existing in the external environment of old communities were excavated from the perspective of functional requirements, and the distributed green space layout pattern and the dynamic simulation of community microclimate environment was constructed through the method of field survey and numerical simulation. Furthermore, the environmental optimization strategies of old communities with combination of peacetime and epidemic situation were put forward to help the epidemic prevention and control. [ABSTRACT FROM AUTHOR]

In this paper, three types of green spaces in Xijing Community in Shijingshan District of Beijing were selected for as the measuring points, the HOBO portable weather station was used to monitor the microclimate environmental changes in the same period and summarize the data of microclimate factors. The effectiveness of the simulation was verified by comparing the measured data with the simulated data obtained through ENVI-met. And strategies for microclimate adaptive design in residential areas were proposed according to the microclimate environmental characteristics of several green spaces. [ABSTRACT FROM AUTHOR]