The main research directions are urban ecology, principles and methods of regional ecological planning, research on ecological environment effects of urban expansion in the Yangtze River Delta and southeast coastal areas, and urban growth management. He has participated in the compilation of four monographs, including China Urban Agglomeration, and published more than 40 papers in Geography Magazine, Ecology Magazine, Professional Geographer and Landscape and Urban Planning. He is in charge of the general project of National Natural Science Foundation "Centrifugal Growth Mechanism and Control Measures of Big Cities in Yangtze River Delta", the project of Jiangsu Innovative Talents Fund "Spatial Distribution and Change Mechanism of Vegetation in Urbanization Area and Its Eco-environmental Effect —— Taking Nanjing as an Example", the major directional project of innovative engineering of Chinese Academy of Sciences, and several projects entrusted by local governments. In recent years, he has been responsible for the planning of Nanjing Eco-city, the strategic planning of Yancheng coastal development, the environmental impact assessment of Chaohu industrial belt planning along the Yangtze River, and the planning of Changzhou urban carrying capacity. , has rich experience in regional and urban ecological environment carrying capacity research and ecological planning.