The main source of the Dajin River originates from the Guoluo Mountain on the border of Qinghai and Sichuan, merges with the Xiao Jin River in Danba County of Sichuan Province and is then called Dadu River, entering the Minjiang River at Leshan County. It is 909 kilometers long and its drainage area is 82700 square kilometers. There are many canyons along the way and the water flow is rapid. Among them, in Jin... On the evening of May 24, 1935, the advance troops of the Central Red Army, the First Regiment of the First Division, passed through more than 80...