Introduction to the Daxia River: The ancient name of Lishui originates from the northern and southern foothills of the Dabulheka Mountain at the junction of Gannan and Qinghai in the Gannan Plateau. It originates from Sanquchuoka in the south and Da Naang in the north. After the confluence, it was called the Daxia River. It is a first-level tributary of the Yellow River.