Dunhuang is situated in the very western end of Hexi Passage in Gansu Province, located in the juncture of 3 provinces, namely Gansu Province, Qinghai Province and Xinjiang Uygur Autonomous Region, and under control of Jiuquan Region. It is a small basin with a very particular geographical environment, which links the qilian Mountains from the south, the large desert from the west, the Hexi Passage from the east. Deserts, gobi, oasis, mountains and lakes are all shown in this area, and they enhance beauty of each other with fertile farmlands and abundant natural resources. The average height above the sea level in Dunhuang is 1,138 meters. It covers altogether 312,000 square kilometers. The Danghe River, which is originated from the glacier in Qilian Mountains, runs through the whole oasis with endless stream. It is 390 kilometers in length with a runoff of 0.328 billion cubic meters per year. So it can irrigate 300,000mu fertile farmlands.