Qinghai Lake is a saltwater lake; There are fish; One kilometer east of Haixishan Island is Haixipi Island, covering an area of 46 hectares. Together, these two islands are called Bird Island, which is the most densely distributed "Bird Kingdom" in the world.

Qinghai Lake, also known as "Cuowumbu", which means "blue sea" in Tibetan, is located in the Qinghai Lake Basin in the northwest of Qinghai Province. It is not only the largest inland lake in China, but also the largest saltwater lake in China. It is formed by the fault subsidence between Datong Mountain, Sun Moon Mountain and Nanshan Mountain in Qinghai. Qinghai Lake is located about 130km west of Xining, with a circumference of 360km, an area of 4400km2 and an altitude of 3260m. It is the largest inland plateau lake in China.

The lake is rich in one of the five famous fish in China-naked carp (commonly known as Huangyu), hard-spined loach and long-headed loach in Qinghai Lake. The average annual yield of naked carp in Qinghai is 5 165 tons, 1949 ~ 1985 * * production19180 tons. With the passage of time, the resources declined, and the output of naked carp showed a downward trend year by year. Naked carp swim back to the source river from June to July every year to lay eggs, which provides rich food conditions for fish-eating birds. 1964, the state listed Qinghai Lake as a protected object, and Qinghai naked carp as an important and precious aquatic economic animal.

By August of 20 14, the number of birds in Qinghai had increased to 222, belonging to 35 families of 14, with a total number of more than16,000, including 2 geese1300, 45,000 brown-headed gulls, fish gulls and cormorants. In addition, there are guanqian duck, red duck, merganser duck, magpie duck, white-eyed duck, spotted duck, needle-tailed duck, swan, demoiselle crane and black-necked crane.