Introduction to Moon City and Weng City: After passing through the city gate, the small city shaped like a crescent moon is called Moon City. It is the first city that must be passed after entering the city gate. To enter the city, you must pass through the second city - Wengcheng. In ancient wars, on the one hand, the Moon City and the Weng City guarded the city gates and deepened the longitudinal defense line of the city gate; on the other hand, it was easy for the defenders to quickly gather and defeat the enemies who had rushed into the Moon City and the Weng City.