The Tongtian River is the main stream of the Yangtze River. Located in Yushu Tibetan Autonomous Prefecture, Qinghai Province, from the western sac pole Baqi, Zhiduo County, where the source of the Yangtze River and the Luohe converge, flows through Zhiduo County, Qumalai County, Qumalai County, called Duo County, Yushu City, 4 counties and cities, to the Xibatang Estuary of Jiegu Town, Yushu City, Qinghai Province, is The following is called the Jinsha River.