Introduction to the Henggou Tunzhuang Site: Located slightly northeast of Jiayuguan City, 40 miles away from Jiayuguan City, 20 miles away from the New Castle, and 10 miles away from Yemawan Fort, it was originally the official village at that time. It is a village covering an area of ​​about 40 acres of dirt castle. Although the ruins are now damaged, there are still some remnants of the wall. The remaining wall is more than 5 meters high and 6 meters thick.