National key cultural relics protection units. Located in the northeast of Gaocheng Town, southeast of Dengfeng City, Zhengzhou City 12km away. The city site is a north-south rectangle. The north wall is built on the mountain and is about 700 meters long. There is a gap 13 meters wide in the middle as the remains of the city gate, and there is a moat about 60 meters wide outside the wall. The east wall is about 2000 meters long along the west bank of the stream, and only part of the city wall is reserved. The western wall is built on the mountain, about 2000 meters long, leaving only the northern section, and there is a moat 60 meters wide outside the wall. Nancheng Wall is about 1000 meters long along the north bank of Heying River in Lingao Town, and there are several existing city walls. The circumference is about 5700 meters, with a total area of 654.38+0.4 million square meters.