Gate introduction: Qiaoling is built on the ground around a mountain. The south wall is 2871 meters long, the west wall is 2836 meters long, the east wall is 2303 meters long, and the north wall is 2883 meters long. The plane is in the shape of a regular knife handle, with an area of more than 8.527 million. square meters. There are gates on each side of the city: the front Zhuque Gate is located in Anwang Village, Potou Township; the rear Xuanwu Gate is located in the north of Shishihuai Village, Dongshan, Qiaoling Town; the left Qinglong Gate is located in the west of Zhaojiashan Village, Sanhe Township; the right white gate is located in the west of Zhaojiashan Village, Sanhe Township. Humen is located in the north of Dangyao Village, Dongshan, Qiaoling Town.