Tongtianhe, the main stream of the Yangtze River at the source. Located in Yushu Tibetan Autonomous Prefecture, Qinghai Province, from the sac pole Bay in the west of Zhiduo County, where the Yangtze River is Zhengyuan Dangqu and Xiyuan Lihe confluence points, flows through Zhiduo County, Qumalai County, Zhiduo County, Zhiduo County, Yushu City, Qinghai Province, and 4 counties and cities, to Xibatang, Jiegu Town, Yushu City, Qinghai Province Until the estuary, the following is called Jinsha River.