Contents of handwritten newspaper for legal protection of the Yangtze River

The content of the handwritten newspaper for protecting the Yangtze River is as follows:

The Yangtze River originates from the "roof of the world" - the southwest side of the Geladandong Peak in the Tanggula Mountains of the Qinghai-Tibet Plateau. The main stream flows through Qinghai Province, Tibet Autonomous Region, Sichuan Province, Yunnan Province, Chongqing City, Hubei Province, Hunan Province, Jiangxi Province, Anhui Province, Jiangsu Province, Shanghai City and *** 11 provincial-level administrative regions (eight provinces, two cities and one district ), which flows into the East China Sea to the east of Chongming Island, has a total length of more than 6,300 kilometers, which is more than 800 kilometers longer than the Yellow River. It is the third longest river in the world after the Nile River in Africa and the Amazon River in South America.

The main stream of the Yangtze River runs through central China from west to east. Hundreds of tributaries run north and south, extending to parts of eight provinces and autonomous regions: Guizhou, Gansu, Shaanxi, Henan, Guangxi, Guangdong, Zhejiang and Fujian. The basin area reaches 1.8 million square kilometers, accounting for about 1/5 of China's total land area. Most of the water from the Huaihe River also flows into the Yangtze River through the Grand Canal.

The main stream of the Yangtze River above Yichang is the upper reaches, with a length of 4,504 kilometers and a drainage area of ??1 million square kilometers. Among them, the Jinsha River from Zhimen to Yibin is 3,464 kilometers long. The section from Yibin to Yichang is traditionally called Chuanjiang River and is 1,040 kilometers long. The middle reaches from Yichang to Hukou are 955 kilometers long, with a drainage area of ??680,000 square kilometers. Below Hukou is the lower reaches, which is 938 kilometers long and has a drainage area of ??120,000 square kilometers.

Historical changes in the Yangtze River

The ancient Yangtze River was formed in ancient times, and most of the Yangtze River Basin was submerged by sea water. During the Triassic period 200 million years ago, the Yangtze River Basin was still occupied by the ancient Mediterranean Sea (the Tethys Sea). At that time, Tibet, parts of Qinghai, western and central Yunnan, and western Guizhou were all vast seas. To the west of Hubei is a vast bay that protrudes eastward from the ancient Mediterranean Sea. The bay extends to the middle of today's Three Gorges of the Yangtze River.

The southern half of the middle and lower reaches of the Yangtze River is also submerged on the seabed. The northern part of the middle and lower reaches and the eastern part of the ancient continent of North China and Northwest Asia and Europe have higher terrain. The Indosinian orogeny occurred at the end of the Triassic period 100-800 million years ago. At that time, the Kunlun Mountains, Hoh Xil Mountains, Bayan Har Mountains, and Hengduan Mountains began to appear. The Qinling Mountains rose up, and the southern half of the middle reaches of the Yangtze River rose into the On land, the Yunnan-Guizhou Plateau begins to appear.

Faulted basins and trough-shaped depressions are formed between the Hengduan Mountains, Qinling Mountains and Yunnan-Guizhou Plateau. At the same time, Yunmengze, Xichang Lake, Dian Lake, etc. are connected in series with each other, flowing from east to west through the Nanjian Strait in western Yunnan and flowing into the Mediterranean Sea, which is opposite to the current flow of the Yangtze River.