Introduction to tunnel warfare: Tunnel warfare was a method of combat during the Anti-Japanese War in which anti-Japanese soldiers and civilians on the North China Plain used tunnels to attack Japanese invaders. After continuous development, it has evolved from a single hiding place to an underground fortification capable of fighting, hiding, waterproofing, fireproofing, and poisoning, and gradually formed a tunnel network of houses to houses, streets to streets, and villages to villages, forming a joint internal and external defense, cooperating with each other, and fighting against An enemy's way of fighting. The cave war in Wuxiang has interrogation rooms, conference rooms, traps, etc. inside, which is very similar to the tunnel war. Liyu Village, Dayou Township, twenty kilometers away from Wuxiang County, was the hometown of the landmine king Wang Laifa during the Anti-Japanese War.