This book provides an in-depth analysis of the characteristics of the core cities, the extent to which the core cities are linked to the peripheral cities, the development capacity of the peripheral cities, the stage of the metropolitan area, the achievements and problems of the development of the metropolitan area, and the ideas for future development. As one of The Chinese Path Series, this book analyzes the reasons for the formation of the development strategy of China's metropolitan area and puts forward a set of theoretical framework for studying the development of the metropolitan area, This framework is used to further analyze the nine major metropolitan areas and summarize the experience and problems in the development of metropolitan areas in China. The author puts forward the idea of developing the metropolitan area in the future.