Introduction to the Zhengyangmen Archery Tower: The Zhengyangmen Archery Tower was built in the fourth year of Ming Zhengtong (1439). , opened in the middle of the city platform, is the only city gate with an archery tower opening among the nine gates in the inner city, and is specially used for dragon chariots and phoenix chariots. The arrow tower has double eaves on the top of the mountain, gray tube tiles and green glazed edges. It has four floors, with 94 arrow windows on the east, south and west sides. It has seven bays on four sides and a width of 62 meters. There are five bays in the north and a width of 42 meters. , the building is 24 meters high, with two doors. The front is a hanging gate (i.e., the thousand-jin gate), and the back is a split iron leaf gate.