Shimen is located in Wuyuan County, Dingxi, near the watershed of Wuyuan South Mountain. It is named after the narrow stone gates in the valley. The surrounding ecological environment is good. Forests, grasslands, snow-capped mountains are scattered, streams are woven, dense grasslands, special geographical location, unique topography and landforms. The evolution of the millennium civilization and the deep cultural accumulation have created a unique and distinctive tourism resource