The Great Wall of Wan Li is magnificent! How do you know the historical materials of the Great Wall when you are just a tour guide?

The Great Wall is a treasure of Chinese civilization, a crystallization of the wisdom of ancient people in China and a symbol of the Chinese nation. China ancient military defense project. Miracle in the history of world architecture. It starts from Shanhaiguan in Hebei Province in the east and ends at Jiayuguan in Gansu Province in the west. It runs through seven provinces, cities and autonomous regions, including Hebei, Beijing, Inner Mongolia, Shanxi, Shaanxi, Ningxia and Gansu, with a total length of about 6,700 kilometers, about 13000 Li, so it is called "Wan Li Great Wall". The Great Wall is a miracle created by working people in ancient China. Since Qin Shihuang, building the Great Wall has been a big project. According to records, Qin Shihuang used nearly one million laborers to build the Great Wall, accounting for 1/20 of the national population! At that time, there was no machinery, and all labor depended on manpower. The working environment was steep mountains and deep cliffs. It is conceivable that this huge project could not be completed without a large number of people working hard.