**2.4 The comprehensive carrying capacity of regional function division**

The comprehensive carrying capacity of a region is different in space and changes dynamically with time. The comprehensive carrying capacity of the region is the sum of all resources in a specific space (material resources, energy resources, information resources, space resources, human resources, social resources, etc.), which can provide the comprehensive development capacity of the region. On one hand, Because of the difference of economic development level and resource endowment in each region, the comprehensive carrying capacity of each region is different. On the other hand, the spatial carrying capacity of a region changes dynamically with time. In some resource-based urban areas, the development of natural resources will generally promote the development of industry and the growth of population, bringing about the improvement of carrying capacity. However, When the stock of natural resources to reduce or dried up, there will be a leading industry gradually decline, the ecological environment is destroyed, social problems highlight contradictions.

To promote the coordinated development of regions, it is necessary to concentrate population and economic activities in regions with high carrying capacity according to the differences of core functions of each region, while reducing the scale of population aggregation and economic activities in ecologically fragile regions. The connotation of regional coordinated development is to comprehensively coordinate the relationship among economy, society, population, resources and environment, and guide the economic layout and population distribution to adapt to the carrying capacity of resources and environment. In order to reduce the imbalance of regional development is to promote regional harmonious

development, according to different regional development potential and the resource environmental carrying capacity, according to the regional division of labor and coordinated development of the principle of overall consideration the future population distribution, economic layout, land use and urbanization pattern, reverse the regional resources excessive development for a long time, the regional ecological environment has become increasingly serious phenomenon.
