The outline of Shanxi's territory is a parallelogram that runs from southwest to northeast. It is a typical mountain plateau widely covered by loess. The terrain is high in the northeast and low in the southwest. The interior of the plateau is undulating, the valleys are vertical and horizontal, and the types of landforms are complex and diverse. There are mountains, hills, terraces, plains, and rivers. The area of mountains and hills accounts for 80.1% of the total area of the province, and the area of Pingchuan and river valleys accounts for 19.9% of the total area. Most of the province's altitude is above 1,500 meters, and the highest point is the Yedoufeng, the main peak of Wutai Mountain, with an altitude of 3061.1 meters, which is the highest peak in northern China.