Xu Da
First built in the mid-6th century during the Northern Qi, the Mutianyu section is older than the Badaling section of the Great Wall. During the Ming dynasty, under the supervision of Marshal Xu Da (a.k.a. Zhongshan Wang, Zhongshan, or Xu Zhongshan), construction of the present wall began, building over the previous wall. In 1404, a pass was built in the wall. In 1569, the Mutianyu Great Wall was rebuilt and till today most parts of it are well preserved. The Mutianyu Great Wall has the largest construction scale and best quality among all sections of Great Wall.