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Found the Hushan site, the Great Wall extended 1000 kilometers #157619436
Description
The Great Wall in mainland China is a military facility against foreign invasion. In the last years of the Ming Dynasty, the Jurchen Uprising in the Northeast became the sphere of influence. The Great Wall lost its function. Therefore, people took the Great Wall from Shanhaiguan to the west to Jiayuguan. In 1989, the site was discovered by aerial photography. After the Great Wall opened to the river, the Great Wall increased by more than 1,000 kilometers, with a total length of 8851.8 kilometers.