Introduction to the Guide Mansion City Wall: The Guide Mansion City Wall in the Ming Dynasty is a national key cultural relic protection unit. It was built in the 37th year of Jiajing in the Ming Dynasty (1558) and consists of four walls: south, north, west and east. Gongyang Gate is in the south, Gongchen Gate is in the north, Binyang Gate is in the east, and Qiaoze Gate is in the west. The trinity of city wall, city outline and city lake makes the ancient city round on the outside and square on the inside, forming a huge ancient coin shape. The architecture is very unique.