Its terrain is dangerous, the throat of the three provinces, has always been a must-win place for the soldiers, the famous northern Song Dynasty general Yue Fei once stationed this pass, Taiping Tianguo Hongxiuquan, Shi Dakai Zeng led the soldiers in this three days and three nights of fierce fighting and left the "Taiping Tianguo Ancient Battlefield and 36 Tombs" site; The Red Seven Army, led by Deng Xiaoping, passed this pass in January 1931, and has trenches, fortresses, etc.