How long is the Great Wall?

The Great Wall Society of China recently announced that less than 20% of the Ming Great Wall's intact walls, less than 30% of the sites, and the total length of the walls and sites does not exceed 2,500 kilometers. According to historical records of the Ming Dynasty, the length of the Great Wall of the Ming Dynasty is about 6,300 kilometers. About 12600 Li. At present, the length standard of the Great Wall is still 6300 km as the official external figure, which may depend on their survey progress at the end of this year or next year. According to Jinghua Times 65438+ 10/2 In 2006, the Great Wall Society of China announced that the scheme of the "Ming Great Wall Aerial Remote Sensing Comprehensive Survey Project" had been worked out and proved by experts, and the project would adopt aerial remote sensing technology for accurate measurement. At present, the project is waiting for the approval of National Cultural Heritage Administration. According to Zhang Ji, deputy secretary-general of the Great Wall Society of China, the Great Wall of Ming Dynasty started from Yalu River in the east and reached Shanhaiguan in the west, but its length, distribution and present situation have not been confirmed. In the past, due to the limitation of measurement methods and equipment, the published 7300 kilometers may be different, so it is impossible to accurately measure the length of the Great Wall.

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