The core of the whole Chongqing urban area, especially the Chaotianmen business circle in Jie Fangbei. The main urban area of Chongqing, that is, the metropolitan area referred to in the overall urban and rural planning of Chongqing, covers Yuzhong District, dadukou district, Jiangbei District, Nan 'an District, Shapingba District, Jiulongpo District, Beibei District, Yubei District and Banan District, with an area of 5472.68k㎡. Metropolitan area is the core carrier of national central city and the political, economic, cultural, transportation and financial center of the city. Yuzhong District is the mother city of Chongqing and the seat of Chongqing Municipal Government. Shapingba District is a cultural and educational district in Chongqing. Beibei District is the relocation area of Chongqing, the capital of the Republic of China. It was once the seat of the Executive Yuan and the Presidential Palace of the Republic of China. Banan District and Yubei District were originally Ba County and Jiangbei County, which are the mother counties of Chongqing, and their status is similar to Minhang District and Baoshan District in Shanghai or Fengtai District and Tongzhou District in Beijing.