Laolongtan is commonly known as "Luohe Brain", located 20 kilometers south of Wuyuan County, Guyuan City. From the geological structure, it is a Grand Canyon formed by the fault of the mountain body of Yanshan Movement and Himalaya Orogeny. It is known as the natural water tower on the Loess Plateau, and the Luohe River flows out from it. It is through Ningxia, Gansu and Shaanxi. Running thousands of miles to benefit the people on both sides of the Straits.