Introduction to the ruins of the Great Wall of the Northern Wei Dynasty: The ruins of the Great Wall of the Northern Wei Dynasty are more than 1,000 kilometers long and the remains are clear. Due to its long construction history, most of the Great Wall is in ruins. This Great Wall was built to prevent the Khitans. It starts from Guyang County, Baotou City in the west and ends at Chicheng County, Hebei Province in the east. It is mainly distributed in the central and western parts of Inner Mongolia.