The Lancang River is the largest river in Southeast Asia and the seventh largest river in the world. It is an international river that flows through China, Laos, Myanmar, Thailand, Cambodia, and Vietnam. It is famous for the fact that one river connects six countries, and is called the “Danube River of the East.” ” is the most convenient golden waterway for my country to enter Southeast Asia. The Lancang River originates from the northeastern Tanggula Mountains in Qinghai Province, China, and flows into the South China Sea in Ho Chi Minh City, Vietnam. The total length of the main stream is 4880km. It is divided from the Nu River by ridge lines such as Nu Mountain (the southern section of Biluo Snow Mountain) and Bangma Mountain in the west, and by mountains such as Yunling and Wuliang Mountain in the east from the Jinsha River and the Red River respectively. The Lancang River runs through the Hengduan Mountains and is the most typical north-south river in the world.