Originally named Wei Ba Mountain City, this ancient city wall was built in the Eastern Han Dynasty with a history of 1900 years. It is a city guarding northern Xinjiang. During the Sui and Tang Dynasties, Koguryo, a northern minority, continued to expand and formed a scale when it occupied Liaodong. Since then, it has been stationed here for generations, and it is an important military fortress in the ancient north. The city is built on the mountain, with deep valleys and inexhaustible springs. It's camped in the city, and it can attack when it enters and defend when it retreats. The mountain city is made of huge granite, with the highest point of 9.4m, the inner wall height of1.24m and the top width of 3.29m.. The original things and walls have been knocked down, and the old traces in other places are still intact. There are Forbidden City, Dianjiangtai, dressing building, beacon tower, training ground and Yinmawan in the city, which is one of the important mountain cities separated from the Central Plains by northern minorities. According to legend, Emperor Taizong Li Shimin defeated Koguryo and stationed troops here.