Lying on the Qinghai-Tibet Plateau, known as the Ridge of World, the Qinghai Lake is embraced by the Datong Mountain, Riyue Mountain and Qinghai South Mountain in the northeast of Qinghai Province. As the largest inland saltwater lake in China, the oval-shaped lake covers an area of 4,635 square kilometers and is 3,196 meters above sea level. The weather here is cool all the year round. Even in midsummer, the daily average temperature is about 15 C, making the lake a perfect summer resort. The Qinghai Lake contains little oxygen and much salt, with little plankton. It has a visibility of 8-9 meters, so it appears especially blue, just like a piece of glittery sapphire. Various kinds of birds hover in the sky while countless fish swim in the water. The lake is surrounded in four sides by Datong Mountain, Riyue Mountain, Qinghai South Mountain and Xiangpi Mountain, serving as four imposing natural barriers. Along the lake, the grassland stretches several hundred miles. Every summer and autumn, the grassland is covered by overlapping grass with numerous flocks and herds, adding an artless flavor and leisure to the lake. Chains of mountains, the blue lake, the green grassland and the yellow wheat fields form a landscape of the open west area. In the Qinghai Lake are five islands of different shapes, namely the Haixin Hill (hill in the middle of the sea), Gucha Hill (Three-stones Hill), Bird Island, Haixi Hill (hill in the west of sea) and Sand Island, of which the Bird Island is the most famous one. Reputed as the Kingdom of Birds, the island is 10 meters above the lake water, covering an area of 0.11 square kilometers. In late spring and early summer every year, thousands of birds come to their kingdom and their chirm can be heard several miles away, forming a spectacular scene. Various kinds of birds roost here, including gull, wild goose, swan, crane, and the rare black neck crane. The lake is also abundant in fish, among which the naked carp is the most famous and delicious. Also known as Huang fish without scale, it has a reputation of the king of lake in the local area.Qinghai Lake Selected Most Beautiful Lake Qinghai Lake, China's largest inland saltwater lake in the northwestern Qinghai Province ranks top of China's five most beautiful lakes in a latest competition activity by the magazine of China National Geography to select the country's most beautiful places. Located at about 3,200 meters above sea level, the lake covers 4,300 square kilometers. It has abundant fish and other aquatic creatures, which in turn attracts large flocks of birds to perch in the islands of the lake. The other four of the most beautiful lakes selected by the magazine are Kanas Lake in Xinjiang, Namtso Lake in Tibet, Heaven's Pool (Tian Chi) in northeast China's Jilin Province and and West Lake in east China's Zhejiang Province. More than 10 Chinese academicians and 100 experts formed a panel to select the most beautiful places in 15 categories. The panel also selected China's most beautiful mountains, canyons, caves, islands, coastlines, deserts, cities, villages, waterfalls, forests, prairies, glaciers and wetlands.