The existing Great Wall in Beijing is 520.77 kilometers long, including Simatai Great Wall in Miyun, Badaling Great Wall in Yanqing, Juyongguan Great Wall in Changping, Jiankou Great Wall in Huairou, Mutianyu Great Wall, Jiangjunguan Great Wall in Pinggu, and Qizulou Great Wall in Mentougou. The Simatai Great Wall located in Miyun is the best-preserved among the 6 areas where the Great Wall is distributed in Beijing. It is one of the most complete Great Wall systems in the history of the Great Wall in China. The Great Wall has never been a Great Wall of bricks, but a Great Wall of people. The story of the wind and clouds and the weeping blood of the Great Wall formed a thick historical culture and legend, buried deep in every piece of the Great Wall, and made the Great Wall great today. This book is divided into two parts: old photos and exhibited works.