Research on sustainable urban design based on small-scale and progressive concept

In China, the trend of urbanization is significant. Cities have become the concentration of population and economy, but they also face a series of "urban diseases" such as environmental degradation, traffic problems, and soaring housing prices. Large-scale urban expansion has made problems such as damaged ecosystems, chaotic spatial structures, and traffic congestion more serious. In order to promote high-quality and sustainable urban development and accelerate the revival of modern cities, the Chinese government has proposed a "double urban repair" policy, including "ecological restoration" and "urban repair." This paper selects the core area of Nanjing as the research object takes "urban repair and ecological restoration" as the guideline, starts from a small-scale, progressive design perspective, and combines a variety of urban design methods and concepts to propose a series of sustainable urban design strategies. These strategies aim to optimize the urban structure, improve the public transportation system, protect historical buildings, effectively integrate green spaces with public spaces, and achieve harmonious coexistence between nature and urban life. The ultimate goal is to create a more prosperous, livable, and sustainable Nanjing and provide experience and models for other cities to learn from. This study focuses on current problems and challenges and strives to provide feasible solutions and innovative design ideas for future development.