The River originates from the Himalayas flows through Qinghai, China and Tibet plateau flow into the South China Sea via China. Laos. Myanmar. Country Thailand Cambodia and Viet Nam The entire length is 4880 km length in China at 2130-kilometer range, the river flows through China, called the river ngachiang or river tea million children and when to flow through the County, Myanmar and Laos known as the river of northern towns, including a call of the River, but in Thailand it is called the Mekong River as a boundary line between the countries, Thailand with Laos.