Introduction to Huangyaguan Great Wall Museum: Huangyaguan Great Wall Museum is the first Great Wall museum in my country. It is close to the ancient Great Wall in Jixian County. The ancient Great Wall is located in the Huangyaguan area, 30 kilometers north of Jixian County. The city wall is 41 kilometers long and was built in 577 AD. The Great Wall, which was renovated in 1984, starts from Banlagang Mountain in the east and ends at Wangmaojing Mountain in the west, winding for 3,025 meters.