Introduction Located in Xiaoping'an Village, 1.0 kilometer southeast of Huangyaguan. The altitude ranges from 400 to 500 meters, starting from Ban La Gang Mountain in the east and ending at Widow House in the west. To the northwest is Fenghuang Tower, and to the southwest is Shuiguan. The total length is 873 meters. The fortress that controls the Chongshan Valley on the east side of Huangyaguan City is famous for its steep mountains and magnificent Great Wall. On the east side of the Great Wall in Taipingzhai, a new entrance style access road was built, with a "Taipingzhai" stone plaque embedded on the door, hence the name. Taipingzhai has six multi well shaped arch structure city towers, one pier, and one entrance gate for climbing the city. The entrance to the city is the Wengcheng, and there is an 8.5-meter-high granite statue of Qi Jiguang on the square in front of the Wengcheng. To the west of Wengcheng is a three pronged wall, with a watchtower extending outward and a water hole inside. The Great Wall changes with the steep mountain terrain, and a circular stone tower is built on the top of the mountain, connecting a steep stone wall of more than 100 meters. It was built during the Northern Qi Dynasty and dates back more than 1400 years. On the inner side of the Great Wall, there is a wall enclosure called "Horse Raising Pavilion", which was an ancient place for raising horses. There is a remnant stele in Xiaoping'an Village, named 'Building a Hollow Enemy Platform Stele'. There is a platform on the city wall at the foot of Ban La Gang Mountain, which is Qi Jiguang's general platform.