What were the areas in Chongqing before Chongqing was directly under the central government?

When comparing Chongqing with other municipalities and prefecture-level cities in China, how should the urban scope of Chongqing be defined? Chongqing itself consists of a main city with nine districts. Conceptually speaking, the main city has nine districts. District refers to the urban area and suburbs of Chongqing, which is similar to the entire city of Shanghai, but much smaller than that of Chengdu. If we define the urban scope of Chongqing, it is obvious that the scope of the entire municipality is too large, the scope of the nine districts of the main city is too small, and the scope of the old Chongqing City is more appropriate. The map of the nine districts in the main city of Chongqing is shown below.

The nine districts in the main city of Chongqing include Yuzhong District, Nan'an District, Banan District, Jiangbei District, Yubei District, Beibei District, Dadukou District, Jiulongpo District and Shapingba District. The photo below is of Yuzhong District, which is located in the center of Chongqing. It is also the only municipal district in Chongqing without suburbs.

The photo below is of Yubei District in the north of Chongqing City, which is the main component of Liangjiang New Area.

The photo below is of Banan District in Chongqing, which is also the largest municipal district in southern Chongqing. From the perspective of Chongqing City, if compared with other prefecture-level cities and municipalities directly under the Central Government except Shanghai, the whole municipality is relatively large and the nine districts of the main city are relatively small. A more appropriate range is the old Chongqing City before direct jurisdiction. The old Chongqing City before direct jurisdiction was equivalent to the eastern part of the current Chongqing City. The comparison between the old and new Chongqing City and Chengdu City, Wuhan City, and Xi'an City is as follows.

Among the nine districts in the main city of Chongqing, except Yuzhong District, all other districts actually have suburbs. Therefore, the nine districts in the main city of Chongqing can be regarded as a combination of urban area + suburban areas. The following is the scope and permanent population of the nine districts of Chongqing's main city, Shanghai, and Chengdu. The nine districts of Chongqing are 5,500 square kilometers, with a population of nearly 9 million. Shanghai is 6,300 square kilometers, with a population of more than 24 million. The city is 14,300 square kilometers. Shanghai, with a population of more than 16 million, can actually be regarded as a prefecture-level city without outer suburbs. Because Shanghai’s urban area is large and its suburbs are small, the nine districts of Chongqing’s main city are obviously equivalent to the scope of Shanghai. However, Shanghai cannot be used as a national example. Therefore, the area of ??major municipalities and prefecture-level cities in the country is larger than Shanghai, and their urban areas are smaller than Shanghai.