Dongda Mountain is the second highest altitude on the Sichuan-Tibet South Line. It is located in Zuogong County, Tibet. The altitude of the mountain is 5008 meters high. The summer lawn is green and the yak are flocked. The scenery is extremely beautiful. On one side of the mountain is the Pentium Lancang River, and on the other side of the mountain is Zuogong. This mountain is known as the "life exclusion zone", is mountaineering enthusiasts should pay attention to altitude sickness, bring anti-high altitude sickness products.