The Simatai Great Wall by lilychina The Simatai Great Wall by lilychina The Great Wall of China is the largest in the world. The Great Wall was once used to defend against military aggression, and the Simatai Great Wall is the most dangerous part of the whole Great Wall. 动感的天空# 长城# 冬季长城# 司马台长城# 北京# 记录北京的春天# …