Using the System for Observation of Play and Recreation in Communities (SOPARC), 36 observations were conducted in three parks in Shenzhen, China, to count the physical activity levels of 12297 visitors in 78 target sports grounds. The gender and age differences in the physically active populations were analyzed in formal and informal sports grounds. The results indicate that the physical activity levels of children and adolescents were significantly higher than those of middle-aged and elderly individuals, and males exhibited significantly higher physical activity levels than females. Among formal sports grounds, the physical activity levels on soccer fields, basketball courts, tennis courts, and ping-pong tables were significantly higher than those on other sports grounds. In informal sports grounds, the physical activity levels of children’s non-apparatus activity spaces were the lowest. Some informal sports areas supported a greater variety of physical activities, such as dancing, badminton, soccer, and kite-flying, on park squares and open grassy areas. The research findings can provide environmental strategies for constructing urban parks that are conducive to enhancing physical activity levels.

Taking non-commercial alleys in Pingshan Village, Nanshan District, Shenzhen as an example, this study identified and extracted 5 categories of 32 environmental factors that have negative effects on women’s safety perception, then ranked and discussed the environmental factors that have significant negative effects, and explored whether women’s socio-demographic variables would lead to differences in safety perception. The results showed that the social environment factors in the alley were more likely to make women feel uneasy than the physical environment factors. Negative special groups and animal activities were the most important factors causing women’s uneasiness, followed by the lack of maintenance of the vertical features of the alleys, such as falling objects and chaotic electrical facilities. In addition, there are significant differences in women’s safety perception among different social backgrounds, that is, educated women, knowing about negative reports in urban villages, and young women are more likely to feel insecure.

This paper takes the modern commercial street in Nanshan District of Shenzhen City, Xili commercial street and Pingshan commercial street in the city village as the research objects. According to the calculation and comparison of the total life cycle of buildings, the construction waste and carbon emissions generated in the process of shop replacement along the street are compared. From the perspective of architectural adaptability design, the following conclusions are drawn. In the process of shop replacement along the street, the differences between shop floor area and store replacement type are the main factors affecting carbon emissions. Smaller shops are conducive to the same type of shop replacement , so as to reduce the amount of construction waste generated by demolition and decoration , and then reduce the amount of construction carbon emissions to protect the ecological environment. The conclusion of this study gives some guidance to the renovation, planning, design and management of stores along the street.