It is located 80 km Northwest of Dunhuang. It was the strategic pass on the ancient Silk Road. It was named as a Yumen pass (Jade Pass in Chinese) because of Hotan Jade from Xinjiang Uyghur Autonomous Region was transported from this pass.
It used to be the pass the Caravan’s on Ancient Silk Road in 2000 years back used to pass. Yumen pass is a small square castle standing in the east west of desert. The view of the vast golden dunes of the Sing Sand Mountian to the south are the highlights of the trip. There are not much to see other than castle.