Two Han passes on the western routes
Yumen Pass and Yangguan guarded different approaches west of Dunhuang. Their earthworks, beacon lines and associated remains recall the Han frontier and the routes that crossed the Hexi Corridor.
Yumen Pass is the earthen gate named in the Silk Roads property. Yangguan marks the southern route through the same frontier landscape. Their walls, beacon mounds and open gravel setting give the two Han passes distinct archaeological ground west of Dunhuang.
Yumen Pass and Yangguan guarded different approaches west of Dunhuang. Their earthworks, beacon lines and associated remains recall the Han frontier and the routes that crossed the Hexi Corridor.