The existing Guancheng of the Niangziguan was built in the Ming Dynasty. The Niangziguan has the ninth gate of the Great Wall known as the Great Wall, which is a must-see place for soldiers in previous generations. The ancient castle is surrounded by mountains and rivers, condescending, and two related doors are built. The east gate is the general brick coupon gate, the title "Direct Li Niangziguan", there is a platform castle, like the use of military parades and looking out for enemy love. Natural barrier.