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Introduction to Chashan Scenic Area: The section of the Great Wall at the entrance of the scenic area is modeled after Jiayuguan. Legend has it that during the Spring and Autumn Period, General Ning Qi of Qi State led his troops to this place. He saw that it is surrounded by mountains. If you enter, you can win by surprise, and if you enter, you can attack. It was a good place for military training and garrisoning, so they stationed here and built the Great Wall for defense at the mountain pass. The Great Wall we see now was built on the original site.