Prefecture-level cities are divided into districts according to the specific situation of each city, and there is no limit to at least several districts or at most several districts. If we want to talk about the policy of setting up municipal districts, the Ministry of Civil Affairs invit《市辖区设置标准》 (draft for comment). According to the exposure draft, municipalities directly under the central government and prefecture-level cities are allowed to set up municipal districts. A city with a total urban population of more than 3 million people can set up a municipal district for every 600,000 people on average. The population of the smallest municipal district shall not be less than 250,000, of which the non-agricultural population shall not be less than 100,000. The suburban county (county-level city) of the central city is changed into a municipal district, and the non-agricultural population in the employed population of the county (city) shall not be less than 70%; The output value of the secondary and tertiary industries accounts for more than 75% of the GDP. In a county (city) with a new municipal district, the gross domestic product (GDP) and fiscal revenue of the county (city) shall not be lower than the average level of the corresponding indicators of the municipal district in the previous year. The establishment of municipal districts in prefecture-level cities has little to do with the comprehensive strength of the city, but with the history and planning of the city. For example, in Guangdong Province, Dongguan and Zhongshan, which are economically developed, have been upgraded from counties to prefecture-level cities, and their administrative divisions have no municipal districts, and the towns are directly under the jurisdiction of the municipal government; The area of Shenzhen is not large, and there are many municipal districts, which should be due to balanced development; Guangzhou, Shantou, Foshan and Zhuhai have no counties (or county-level cities) within their jurisdiction; Zhanjiang, Shaoguan and Jiangmen are relatively early prefecture-level cities in Guangdong. When many cities in the Pearl River Delta are still county towns, they are big cities in Guangdong Province, and there are relatively many municipal districts.