Introduction to the ruins of the Ancient Great Wall of the Northern Qi Dynasty: The ruins of the Ancient Great Wall of the Northern Qi Dynasty, which is more than 1,400 years old, winds for more than 5,600 meters in the Limutai Scenic Area. It is built on a ridge between 500 and 900 meters high, with undulating and steep hills. Dangerous. The city walls are all made of rubble, and some of the walls are well preserved, telling the vicissitudes of ancient history.