Why is Yibin below called the Yangtze River, and Yibin above is the upper reaches of the Yangtze River, and rivers do not include all the upper reaches?

The statement that "Yibin is called the Yangtze River below" is not accurate in itself. Yibin is only the upstream demarcation point among the demarcation points of the upper, middle and lower reaches of the Yangtze River, and there is no saying that "Yibin is hereinafter called the Yangtze River".

Division: Above Yichang, the main stream of the Yangtze River, is the upper reaches, with a total length of 4,504 kilometers. Yichang to Hukou is the middle reaches, 955 kilometers long. Below the estuary is the downstream, which is 938 kilometers long.

The upper reaches of the Yangtze River are 45 1 1km from the east of Gradang in the Qinghai-Tibet Plateau to Yichang in Hubei Province. The main and tributary basins in this section cover a wide area, covering Qinghai, Tibet, Sichuan, Yunnan, Chongqing, Guizhou, Gansu, Shaanxi, Hubei and other provinces and cities.

Extended data:

Related areas of the Yangtze River:

The main stream flows through Qinghai, Xizang Autonomous Region, Sichuan, Yunnan, Chongqing, Hubei, Hunan, Jiangxi, Anhui, Jiangsu, Shanghai * * *1provincial administrative regions (eight provinces, two cities and one district) and flows into the East China Sea east of Chongming Island, with a total length of more than 6,300 kilometers.

The source of the Yangtze River is located in the hinterland of the Qinghai-Tibet Plateau, where the terrain is high, the air is thin, the climate is bad, the traffic is dangerous and inaccessible. Dangqu River, the source of the Yangtze River, Tuotuo River in the west and Chuma River in the north all originate here.

The main stream of the Yangtze River runs through central China from west to east. Hundreds of tributaries converge north and south, extending to parts of eight provinces, including Guizhou, Gansu, Shaanxi, Henan, Guangxi, Guangdong, Zhejiang and Fujian. The drainage area is 6.5438+0.8 million square kilometers, accounting for 654.38+0/5 of the total land area of China. Most of the water in the Huaihe River also flows into the Yangtze River through the Grand Canal.

Baidu encyclopedia-Yangtze river

Baidu encyclopedia-the upper reaches of the Yangtze River