The ancient city of Bunker was built about 1206-1279 AD, at an altitude of 3645 meters, which is the main road to the Hexi Corridor. It is also the must-pass place from Qilian to Menyuan and Xining. It is an important station on the ancient Silk Road South Road, the tea-horse exchange market and the military fortress. Known as Qinghai North Gate. The town in front of you is located under the blue sky and white clouds, behind you is the snow-capped mountains, straight to the point, go out to snow, this is probably the legendary fairy tale town.