The Lancang River originated in the northeast of Tanggula Mountain in Qinghai Province, China, flows through Myanmar, Laos, Thailand, Cambodia, and in Ho Chi Minh City, Vietnam, injecting the South China Sea, is the largest international river in Southeast Asia. The dry current is 4880 km long. It is called the Lancang River in China. After leaving Xishuangbanna, it is called the Mekong River. It flows through the entire Yunnan. Because there is no pollution in the industrial area, the water quality of the entire Lancang River is very good. The gushing river water and the white flow are out of the country. It is a pity.