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The Great Wall



Source: internal company

The Great Wall is a military defense project in ancient China. It is a tall, strong and continuous placanticline to limit the actions of enemy riders. The Great Wall is not a purely isolated city wall, but a defense system with the city wall as the main body and a large number of cities, barriers, pavilions and signs. 


The history of the construction of the Great Wall can be traced back to the Western Zhou Dynasty, from which the famous allusion "War Drama Governors", which took place in the capital Haojing (now Xi'an, Shaanxi Province), originated. During the Spring and Autumn and Warring States Periods, nations competed for supremacy and defended each other. The construction of the Great Wall reached its first climax, but the length of construction was relatively short at this time. 

After Qin destroyed the six countries and unified the world, Qin Shihuang connected and repaired the Great Wall of the Warring States Period, which became known as the Great Wall. The Ming Dynasty was the last dynasty to overhaul the Great Wall. Most of the Great Wall people see today was built at this time. Great Wall resources are mainly distributed in 15 provinces and cities including Hebei, Beijing, Tianjin, Shanxi, Shaanxi, Gansu, Inner Mongolia, Heilongjiang, Jilin, Liaoning, Shandong, Henan, Qinghai, Ningxia and Xinjiang. 


In the middle of the period, Shaanxi Province is the province with the most abundant resources of the Great Wall in China, with the length of the Great Wall reaching 1838 kilometers. According to the results of the national survey of Great Wall resources conducted by the Department of Cultural Relics and Surveying and Mapping, the total length of the Great Wall in the Ming Dynasty was 8851.8 km, and that of the Great Wall in the Qin and Han Dynasties and the early days was over 10,000 km, with a total length of over 21,000 km. 

How to Build the Great Wall: 
The Great Wall's Defense Engineering Building the Great Wall's Defense Engineering Building has accumulated rich experience in the construction process of more than 2,000 years. 
First of all, in terms of layout, when Qin Shihuang built the Great Wall, he summed up the important experience of "using risks to control the blockage due to the terrain". Then Sima Qian wrote it into Records of the Historian. After that, every dynasty built the Great Wall according to this principle and became an important basis for military protection. 

All the construction of Guancheng Pass is between the two mountains and valleys, or at the turning point of the river, or at the place where the plain must pass. This can not only control the danger, but also save manpower and materials to achieve the effect of "and while one man guards it, ten thousand cannot force it". 


Building castles or beacon towers is also a choice in dangerous places. As for the construction of the city wall, full use is made of the terrain. For example, the Great Wall like Juyongguan and Badaling are all built along the back of the mountains. Some sections are very steep from the outside of the city wall, while the inside is very gentle, with the effect of "easy to defend and difficult to attack". In Liaoning, the Great Wall in Liaodong Town in the Ming Dynasty had a kind of wall called mountain danger wall and split mountain wall, which was to make use of the steep cliff and cut the cliff slightly to become the Great Wall. There are also some places that make full use of dangerous cliffs, rivers and lakes as natural barriers.

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