Grasp one or two aspects of the information about the Yangtze River and tell me what you know about it. Only about 100 words. Ignore too much and don't want too little.

The Yangtze River is the largest river in China, the largest river in Asia and the third largest river in the world.

200 1 Under the auspices of Liu Shaochuang, an expert from the Institute of Remote Sensing Application, Chinese Academy of Sciences, satellite remote sensing images were used for measurement and calculation, and the measurement results were accurate to two decimal places. The length of the Yangtze River is 62 1 1.3 1 km (about 6200KM long). Its research team used nearly 40 satellite images covering the main stream of the Yangtze River, which were taken by the American Earth Resources Satellite with a resolution of 30 meters. The calculation method is that the center line along the Yangtze River is measured three times in the forward direction and three times in the reverse direction, and the result is obtained after many computer operations and geometric corrections. This study takes Dangqu as the source of the Yangtze River, specifically the source of Dangqu (Duochaoneng): 94 30 ′ 44 ″ east longitude, 32 36 ′14 ″ north latitude and 5170m above sea level. Dangqu (source to Nangji Balong) is 353.3 kilometers, Tuotuo is 343.8 kilometers, Tongtian River is 787.7 kilometers, Jinsha River is 2322.2 kilometers, and Yibin is 2740.6 kilometers below. We usually call it 6300 kilometers or 6370 kilometers. The average annual water inflow into the sea is more than 960 billion cubic meters. The watershed is between 24 30 ′ ~ 35 45 ′ north latitude and 90 33 ′ ~112 25 ′ east longitude. It has a long history and has given birth to Chinese civilization, Chinese nation and Chinese sons and daughters from generation to generation.

Wang Xizhi and Sun Chuo used the name "Yangtze River" earlier in the Eastern Jin Dynasty. Wang Xizhi wrote to Yin Hao and said, "Today's army is broken from the outside and exhausted from the inside. The ambition to protect the Huaihe River is beyond our power. There is nothing better than protecting the Yangtze River! " (Biography of the Book of Jin and Wang Xizhi); Sun Chuo said to me, "Heaven has not changed, and Zhongzong is a dragonfly. This is not just a matter of obedience and harmony between man and nature. It depends on the ears of the Yangtze River. " (Biography of Sun Chuo in the Book of Jin)

Map of the Yangtze River Basin (Administrative Region) The Yangtze River Basin is about 32 19 kilometers long from east to west and about 966 kilometers long from north to south. The Yangtze River flows through: Qinghai-Tibet-Sichuan-Yunnan-Chongqing-Hubei-Hunan-Jiangxi-Anhui-Jiangsu-Shanghai-East China Sea. Originated in the west of China, all or part of it flows through 13 provinces including Xizang Autonomous Region. The population distribution in the Yangtze River basin is uneven; The most densely populated area is in the plain area adjacent to the Yangtze River and its tributaries in central and eastern China, and the western plateau of the basin has the least population. More than 3/4 of the process goes through the mountains. There are Yalong River, Minjiang River, Jialing River, Tuojiang River, Wujiang River, Xiangjiang River, Hanjiang River, Ganjiang River, Qingyi River, Huangpu River and other important tributaries. Among them, the Hanjiang River is the longest, and the Yalong River, Minjiang River, Jialing River and Hanjiang River are north of the main stream. To the south of the main stream are Wujiang, Xiangjiang, Yuanjiang, Ganjiang and Huangpu rivers. Danjiangkou Reservoir in the middle and upper reaches of Hanjiang River is the water source of the Middle Route Project of South-to-North Water Transfer.

This valley is a huge granary in China, which produces almost half of the country's grain, of which rice accounts for 70% of the total. In addition, many other crops are planted, including cotton, wheat, barley, corn, beans and so on. Shanghai, Nanjing, Wuhan, Chongqing, Chengdu and other big cities with a population of more than one million are all in the Yangtze River basin.

The main stream of the Yangtze River flows through 1 1 provincial administrative regions. From west to east are Qinghai, Sichuan, Xizang Autonomous Region, Yunnan, Chongqing, Hubei, Hunan, Jiangxi, Anhui, Jiangsu and Shanghai. Finally, it flows into the East China Sea from Chongming County, Shanghai. Its tributary basins also include parts of Gansu, Guizhou, Shaanxi, Guangxi, Henan, Zhejiang and Guangdong provinces.

The Jacky detachment of the Yangtze River originated from the Gladden Snow Mountain in Tanggula, the southwest border of Qinghai, and was called Tongtian River after it merged with the local music in the south of the Yangtze River. After the Tongtian River joins the Chumar River, the northern source of the Yangtze River, it flows southeast to the Batang estuary in Yushu County. Since then, the main stream of the Yangtze River between Yibin City, Sichuan Province is called Jinsha River; Yibin is called the Yangtze River below, Jingzhou Jingjiang before, and Yangzhou below before. It joins the East China Sea in Shanghai. There are tributaries such as Yalong River, Minjiang River, Tuojiang River, Chishui River, Jialing River, Wujiang River, Xiangjiang River, Yuanjiang River, Hanjiang River, Ganjiang River, Qingyijiang River and Huangpu River, as well as important lakes such as Dianchi Lake, Caohai Lake, Honghu Lake, Dongting Lake, Poyang Lake, Chaohu Lake and Taihu Lake. It intersects with the Beijing-Hangzhou Grand Canal in Zhenjiang City, Jiangsu Province.

The upper reaches of the Yangtze River are between Yibin City, Sichuan Province and Yichang City, Hubei Province, with many rapids. Yichang to Hukou in Jiangxi is the middle reaches, with developed meanders and numerous lakes (Poyang Lake is the largest, followed by Dongting Lake). Below the estuary is the downstream, and the river is wide. Chongming Island is formed by accumulated water in the estuary. The Yangtze River is rich in water resources. During the flood season, 10,000 tons of steamboats can reach Wuhan, and small steamboats can be traced back to Yibin. The Yangtze River Basin is a densely populated area in China and the most prosperous area passing through the Three Gorges Dam. The important cities along the Yangtze River are Chongqing, Wuhan, Nanjing and Shanghai.