In the Song Dynasty, Chongqing was subordinate to Xichuan Road and Xiaxi Road (also known as Xialu, governing Fengjie) for a short time, and Kuizhou Road (one of the four roads in Xia Chuan, governing Fengjie) for most of the time. In the first year of Chongning in the Northern Song Dynasty (1 102), due to Zhao Chen's rebellion, Song Huizong changed the meaning of "Chongqing" to "Duke of Zhou".

In the 16th year of the Southern Song Dynasty (1 189), Song Guangzong was first conferred the title of King Gong, then acceded to the throne, boasting that he was "celebrating the Double Celebration" and was promoted to Chongqing, hence the name Chongqing. It has been more than 800 years.

Chongqing, also known as Mountain City and Jiangcheng City, is a municipality directly under the Central Government of the People's Republic of China, a national central city and a megacity, one of the important national central cities approved by the State Council, the economic center of the upper reaches of the Yangtze River, and the core city of the twin-city economic circle in Chengdu-Chongqing area, with jurisdiction over 38 districts and counties. The total area is 82,400 square kilometers, and the permanent population at the end of 2022 is 32133,400.

Chongqing is a national historical and cultural city and the birthplace of Bayu culture. It has a history of more than 3,000 years, and has been known as "born in Chongqing" since ancient times. Xia, Shang and Pakistan all established their capitals here, and established their countries here at the end of Yuan Dynasty.

At the end of the Qing Dynasty, Chongqing opened its port and the national government moved its capital to Chongqing, which made Chongqing the political, military, economic and cultural center in the rear area of modern China and the birthplace of Hongyan spirit. New China was originally a resident and municipality directly under the central government in southwest China, and was restored as a municipality directly under the central government in 1997.

Geographical environment:

Location context:

Chongqing is located in the southwest of China, on the upper reaches of the Yangtze River, with a land span of1051'~10/1'and a latitude of 28 10' ~ 32 60'. It borders Hubei and Hunan in the east, Guizhou in the south, Sichuan in the west and Shaanxi in the north. The jurisdiction is 470 kilometers long from east to west and 450 kilometers wide from north to south, covering an area of 82,400 square kilometers.

Terrain:

There are Daba Mountain in the north, Wushan Mountain in the east, Wuling Mountain in the southeast and Dalou Mountain in the south of Chongqing. The elevation of the main urban area of Chongqing is mostly between 168 ~ 400 meters. The highest peak in the city is Yintiaoling, the main peak of Liang Jie on the eastern edge of Wuxi County, with an altitude of 2796.8 meters; The lowest is the Yangtze River in Wushan County, with an altitude of 73. 1 meter.

The height difference in Chongqing is 2723.7 meters. The territory of high mountains and deep valleys, ravines. Mountain areas account for 76%, hills account for 22%, and valley flat dams only account for 2%. Among them, the area below 500 meters above sea level is 3 1.8 thousand square kilometers, accounting for 38.1%of the national territory; 20,900 square kilometers at an altitude of 500-800 meters, accounting for 25.46438+0% of the land area; 16800 square kilometers at an altitude of 800 ~ 1200m.

Accounting for 20.42% of the land area; Above sea level1.200m1.280km2, accounting for 15.56% of the national territory. The terrain of Chongqing gradually decreases from north to south towards the Yangtze River basin, with hills and low mountains in the northwest and middle.

There are two mountains in the southeast, Daba Mountain and Wuling Mountain, which have many slopes, so they are called "mountain cities". The general terrain is high in the southeast and northeast, low in the central and western regions, and gradually decreases from north to south to the Yangtze River basin.

Reference to the above content: Baidu Encyclopedia-Chongqing