Where is the Great Wall of Wan Li on the map of China?

Great Wall resources are mainly distributed in Hebei, Beijing, Tianjin, Shanxi, Shaanxi, Gansu, Inner Mongolia, Heilongjiang, Jilin, Liaoning, Shandong, Henan, Qinghai, Ningxia, Xinjiang and other provinces, autonomous regions and municipalities.

Shaanxi Province is the province with the richest resources of the Great Wall in China, with a total length of 1838 km. According to the results of the national Great Wall resources survey conducted by cultural relics and surveying and mapping departments, the total length of the Great Wall in Ming Dynasty was 885 1.8km, and it was more than 1 1,000 km in Qin and Han Dynasties and its early period, and the total length was more than 2 1 1,000 km.

Extended data:

Building method

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".

In Liaoning Province, the Great Wall in Liaodong Town in Ming Dynasty had a kind of dangerous mountain wall and split wall, that is, using a steep cliff, splitting the cliff a little, and it became the Great Wall. Some places completely regard cliffs, rivers and lakes as natural barriers.

Based on the principle of "using local materials and teaching students in accordance with their aptitude", many structural methods have been created. There are rammed earth, rubble, masonry and other structures; In the desert, willow branches, reeds and sand grains are also used, and this section of the Great Wall of the Western Han Dynasty more than 2,000 years ago is still preserved in Yumenguan, Yangguan, Xinjiang and other places in Gansu.

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