The Yangtze River is called Jinsha River from Yibin , which is the main source of the Yangtze River. However, about one million years ago, the source of the Yangtze River was Yalong River , because at that time a very strong earthquake occurred in Hengduanshan area. The earthquake not only changed China's paleogeographic environment, but also promoted the great migration of humans in East Asia, and gave birth to the ancient Qiang tribe, the first ethnic group in East Asia.
Due to the intense orogenic activities of the Himalayas, the famous geographical folds on the earth were formed between 98 degrees north and east longitude 27 degrees north latitude and 100 degrees northeast longitude. At the same time, three huge rivers were also born, and the wonders of the Lancang River and the Nujiang River flowing together.
The major earthquake not only changed the geographical landscape of East and South Asia, but also changed the direction of rivers, forming the famous big turn of the Jinsha River.
Before this, the Jinsha River flowed south into the Yuanjiang River and was the source of the Yuanjiang River. Due to the major earthquake, the Jinsha River diverted its route and flowed northward into the Yangtze River.
At the same time, due to the diversion of the Jinsha River, the ancient riverbed of the Jinsha River also formed an damming lake Erhai Lake.
And the evidence of the earthquake is the Great Rift Valley in Wuding County, Yunnan Province. The Great Rift Valley is more than ten kilometers long and more than three hundred meters deep.
The major earthquake not only changed the geographical environment of the Jinsha River Basin, but also caused the ancient apes who were active in Yunnan to migrate northward. Due to the panic caused by the earthquake, the ancient apes who were active in Yunnan in East Asia scattered and migrated around. One of them crossed the Jinsha River and crossed the Qinling to the north, and came to the Weihe valley to reproduce. This is the Lantian ape people , which is one million years ago.
