City and village
The rural population is predominantly rural; urban-based non-agricultural population.
Rural population density; urban population density.
In rural areas with farming, forestry, animal husbandry, fishery and other primary industry-based; urban industrial, service and other secondary and tertiary industries mainly.
Rural single function, with light, heat, water, soil and other natural conditions, are closely related; urban area is the political, economic, cultural and transportation center.