| variable | Variable description | unit |
| Population density (pden) | Permanent residents/Built-up area | people/km2 |
| Employment density (eden) | Non-agricultural urban employees/Built-up area | people/km2 |
| Employment density in modern service industries (mser) | Modern service industry urban employees/Built-up area | people/km2 |
| Employment density in traditional services (tser) | Town employees in traditional service industries/Built-up area | people/km2 |
| Industrial employment density (ind) | Industrial town employees/Built-up area | people/km2 |
| The level of economic development (gdp) | Gross domestic product/Built-up area | Ten thousand yuan/km2 |
| Infrastructure level (bus) | Bus/Built-up area | Vehicles/km2 |
| medical level (bed) | Number of beds/Built-up area | beds/km2 |