Introduction to the Cangbing Cave: The Cangbing Cave is the ancient city wall of Jingzhou that still has the most combat defense function and the most distinctive supporting fortifications among the military fortifications. There are one in the east, west, and south, each 10.5 meters long and 6.3 meters wide. meters, 6 meters deep, divided into upper and lower floors, and can accommodate more than 100 people. There is also a small Tibetan soldier cave on each floor, each small cave can accommodate 2 people, and there are perforations in the caves. The wall where the Tibetan Soldier Cave is located protrudes outward in a rectangular shape. The enemy attacking the city can be shot with holes and hidden arrows from three sides to catch them off guard.