Different countries have different types of urbanization. There are "mature cities" that have grown during the first and second urbanization waves and "emerging cities" that are currently forming. These two types of cities' form and function have been changed because of the development of Digital Communication Technologies and therefore, a new type of city development, one we might call the ‘f lat city", appears. "Flat city" is a city within which economic development and information freedom can be achieved anywhere. It helps to avoid the over extension of infrastructure and reduce per capita GHG. Meanwhile, the Chinese people's lives are inf luenced by Digital Communication Technologies. Due to the development of f lat city, urban structure transforms from once dominated by a "functional center" to one dominated by "comprehensive community clusters"; urban road function changes from "transportation priority" to "life priority"; and more small-scale city centers which are connected each other and complemented in functions are created. The concept of flat city is an important reference for the development of Chinese cities whose land and energy resource are under increasing strain.