The elevation of the castle is1040m, and it covers an area of about120,000m2. Built along the tableland, the south is high and the north is low, commanding, forming an ancient strategic base defense and orderly village that is "easy to defend but difficult to attack and has a retreat". The wall of the fort is made of local materials, compacted by layers of loess excavated by tunnel construction, and built along the cliff. Although the fortress wall is not made of masonry, it is very strong, leaving two gates in the north and south, with a 300-meter-long street built of red sandstone in the middle, three alleys in the east and four alleys in the west, all of which extend upward from the middle of the street and have access to the village. On both sides of the street are shop facades left over from the past, antique houses, willow pagodas and unique gatehouses, which are full of the colors of antique northern residential buildings. The most dazzling thing is that a small village fort not only has folk houses, but also more than ten temples, pavilions and pavilions built since the Tang and Song Dynasties. These buildings are covered with glass roofs and painted with colorful decorations. The most rare thing is that there are two glass monuments. The monument is made of glass, with a hole at the bottom of Quelan, written in black, and there are green, yellow, green and Erlong playing beads on the monument. According to experts' research, these two historic sites are the only ones discovered in China so far, which have high cultural value. There are so many Buddhist temples in a small village, which is also very unique and mysterious.

The underground of the castle is covered with passages, which extend in all directions with the castle to form underground military defense facilities. The tunnel is three-dimensional. The top floor is more than one meter from the ground, the middle floor is eight to ten meters from the ground, and the bottom floor is seventeen to twenty meters from the ground. Each floor is about two meters high. The bending is blurred, forming a network structure. There are holes in the north-south ditch outside the fort, which can be used as both an entrance and a sentry. There are ventilation holes and wells in the tunnel; There is a small pit in the hole in the wall at regular intervals, which is where the oil lamp is put. There are earth troughs for feeding livestock on the top, middle and bottom floors, and there are caves for storing grain, earth caves for sheltering from the wind and big holes for stationing troops at regular intervals. According to expert research, such a huge and complicated underground project is by no means a private building, but an underground military facility built in ancient times according to the "Ming Bao Bei Dao" mentioned in Sun Tzu's Art of War.