Biedieli Mountain Pass in Wushi County, Xinjiang, formerly known as Bodaling and Biedieli Daban, is located in the west of Aksu Prefecture, Xinjiang, 66 kilometers southeast of Wushi County. It was one of the passages of the ancient Silk Road. Diezhangguan runs north-south, with a width of about 30 meters and an altitude of 4269 meters. Mountain peaks stand on both sides, with steep south slope, gentle north slope, steep terrain and windy mountain surface.