Bet365 app download Yellow River to Yixiang "Good Stubborn、Good decision、Good migration "is known，River channels have changed several times。but，The Yellow River during the pre -Qin period did not have a large -scale diversion，Instead, I always take the "Han Zhi" river.。The Bet365 lotto review "Yugong" river recorded in the literature is actually "Han Zhi" River，Jun County、The so -called "Yugong" River in the Yellow area is the Qihe Hosting Road。The large -scale diversion of the Yellow River starts from the Han Dynasty，After more than 2,000 years of frequent diversion、Migration，Formed a 6-15 -meter thick stasis layer in the lower reaches，completely changed the hills in the lower reaches of the Yellow River during the pre -Qin period、Natural landscapes bet365 live casino games in the river and lakes，Finally, the plain landform that is endless today。Director of the road causes the regional civilization process to interrupt，Most cities are destroyed。Ecology for thousands of years in the lower reaches of the Yellow River、Changes in the living environment，The flood of the Yellow River on the surface、Database、Migration related，But it is essentially the excessive use of human beings for the excessive use of natural resources。

　　Keywords:Pre -Qin period  "Yugong" River  "Han Zhi" River  Migration of the river

　　AuthorYuan Guoguo, Professor of History of Capital Normal University (Beijing  100048）。