1. Area: Generally speaking, a city with a population of 50,000 needs to cover an area of 20-30 square kilometers.

2. Residential area: It accounts for more than 50% of the total urban area, including houses, commercial complex buildings and apartments. , building height control between 4- 10 floor.

3. Business district: It accounts for about 25% of the city's total area, including commercial streets, shopping centers and supermarkets.

4. Transportation facilities: The increase of urban population requires supporting the construction of transportation facilities, including subways, buses and taxis.

5. Public facilities: With the increase of urban population, it is necessary to build public facilities, including hospitals, schools, libraries and gymnasiums.