The Lancang-Mekong River originated from Zaqu at the Gangguori Peak of Tanggula Mountains in Qinghai Province, China. The section between Changdu and Yunnan in China is called Lancang, while the section beyond the border through Nanla River Mouth is known as Mekong. From north to south, the Lancang-Mekong River runs through China's Qinghai, Tibet and Yunnan provinces and five other countries, i.e. Myanmar, Laos, Thailand, Cambodia, and Vietnam, and empties into the South China Sea in the Mekong Delta near Ho Chi Minh City, Vietnam. This important international river in Asia has a total length of about 4,900 km, ranking sixth in the world.