Plentiful salt lake resources are the first big resources in Qinghai, which also top the first in China. Among these salt lakes, the largest and the most famous salt lakes are Caka Salt Lake and Chaerhan Salt Lake, which are distributed in Chaidamu Basin. Caka salt lake means “the sea of salt” in Mongolian. It lies in the center of Caka Basin, the south of Caka town. which is 15.8 kilometers long from the east to the west and 9.2 kilometers wide from the north to the south with a total area of 105 square kilometers. Caka Salt Lake is a scenic spot of combining the scenery tourism with industry tourism, and the only national AAA scenic zone related to salt lake at present. By the preliminary estimates, the storage of sodium chloride is about 4.5 billion tons with 8 meters to 15 meters thickness of salt and it is edible for the population of the whole state for about 100 years. For it belongs to a typical chloride salt lake. The salt crystal in Caka Salt Lake is big, pure and sweet-smelling. Now it is extracted with modern technological process and some new productions are developed such as iodine salt, cleaned salt, regenerated salt, zinc salt, refined salt and salt for domestic animals. They have been sold all over the country and exported to Hong Kong, Taiwan Japan, Nepal and other districts or countries in the Far East and the Middle East. There tourists can watch the mining of salt and admire various salt crystals in the shape of pearls, corals, snowflakes and mushrooms. As long as people excavate the surface of the salt more than 10 centimeters thick, the natural crystal can be reached from below. The brine after mining can crystallize into salt again. Therefore, it is inexhaustible.