Who built the Great Wall?

The Great Wall was originally built by Qin Shihuang. Since Qin Shihuang, almost all dynasties that ruled the Central Plains have built the Great Wall. More than ten dynasties, including Han, Jin, Northern Wei, Eastern Wei, Western Wei, Northern Qi, Northern Zhou, Sui, Tang, Song, Liao, Jin, Yuan, Ming and Qing, all built the Great Wall of different scales.

According to historical documents, more than 20 vassal states and feudal dynasties built the Great Wall. If you add up the Great Wall built in different times, it is more than 10 in Wan Li, and the length of the Great Wall in Qin, Han and Ming dynasties exceeds 1 Wan Li.

China, Xinjiang, Gansu, Ningxia, Shaanxi, Inner Mongolia, Shanxi, Hebei, Beijing, Tianjin, Liaoning, Jilin, Heilongjiang, Henan, Shandong, Hubei, Hunan and other provinces, municipalities and autonomous regions all have the remains of the ancient Great Wall and beacon towers.

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Construction method of the Great Wall:

First of all, in terms of layout, when Qin Shihuang built the Great Wall in Wan Li, he summarized the important experience of "blocking roads because of dangerous terrain", and then Sima Qian wrote in Historical Records. After that, every dynasty built the Great Wall according to this principle, which became an important basis for military protection.

All the passes in Guancheng are built between two high mountains and canyons, or at the bend of a river, or where they will pass through the plain, which can not only control the danger, but also save manpower and material resources, and achieve the effect of "one person guards it, and ten thousand people can't force it". Building castles or beacon towers in dangerous places is also an option.

As for building city walls, we should make full use of the terrain. For example, Juyongguan, Badaling and other Great Walls are all built along the back of the mountain. Some sections are steep from the outside of the city wall, but very gentle inside, which has the effect of "easy to defend but difficult to attack".

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