Introduction to Quanwan: Quanwan, Nagaze tidal flat swamp, is located in the southwest of Qinghai Lake. There are many springs here forming a swamp wetland. It is not frozen in winter and is not easy for people and animals to enter. There are abundant aquatic plants and plankton within 6-8 kilometers near the lake shore. It is the living area of ​​Qinghai Lake naked carp larvae, as well as the brooding area and habitat of many migratory birds and traveling birds. Rare birds such as whooper swans and black-necked cranes live here.