The mountain is also known as three stones. It is located in the southwest of Qinghai Lake, 8 kilometers south of the lake and 20 kilometers from Bird Island in the northwest. The three stones are composed of reefs, gravel beaches and sand, about 700 meters long from the east and west, and about 150 meters wide from the north and south. The southern slope of the reef is relatively gentle, and the north is steep. The vegetation on the island is sparse, only growing in the gap between the gravel, there are gray vegetables, oxtails, etc., covering less than 5 [%]. This is one of the islands where birds and birds live most in Qinghai Lake.