Introduction to the Great Wall of the Northern Qi Dynasty: There are two parts of the Great Wall of the Northern Qi Dynasty in Heyeping that are very well preserved. They are both on the ridge leading to Kelan. They are located on the top of the stone wall, with huge boulders on the sides and gravel in the middle. The stone wall is about 5 meters high and 3 meters wide at the top. There are also relics of ancient military garrison inside the Great Wall.