The main peak of the ancient Wudang Mountain in Wu 'an City, Hebei Province is 1437.7 meters above sea level, which is called Laoyeding in the north. 0.5km to the south of the main peak, there is another peak with an altitude of1420m, named Grandma Ding. The two peaks echo each other from a distance and pierce the sky.

Mount Tai, also known as Daishan, Daizong, Daiyue, Dongyue and Taiyue, is one of the five mountains, and the main peak Yuhuangding is about 1545 meters above sea level.