In late autumn, Chaka Salt Lake, located on the Qinghai Tibet Plateau, has gradually purified its water and crystallized its salt layer. The calm surface of the lake is like a natural mirror, reflecting the beautiful sky and distant snow mountains, forming a scene of water and sky. Chaka Salt Lake is located in Chaka Town, Ulan County, Haixi Mongolian and Tibetan Autonomous Prefecture, Qinghai Province, in the Qaidam Basin. The lake is 3100 meters above sea level and covers an area of 105 square kilometers. With a long history and long literary charm, it is one of the cradles of Chinese salt culture and a natural crystalline salt lake. As the reflection of brine on the crystal salt layer of the lake surface forms a mirror effect, reflecting the water and sky, it is so beautiful that it is called the Chinese version of "the mirror of the sky". (The picture shows the scene of water and sky.) (The picture shows the crystalline salt layer on the lake surface.) (The picture shows the snow mountain far from the shore of the salt lake.) (The picture shows the rich autumn scenery on the shore of the Salt Lake.) (The picture shows the reflection of the salt layer and clouds of the salt lake.) (Liu Xinshe)