The ancient salt fields of Mangkang Yanjing in Qamdo area have a history of 1300 years. It is located on the east and west sides of the Lancang River in Yanjing Town, Mangkang County, Tibet. It is the only place in China to maintain a complete and original hand-salted salt method, more than 120 kilometers away from Mangkang County. Salt wells have retained the relatively complete ancient salt production methods in China.