What the hell is the "Yin Soldiers Borrowing the Road" mentioned in Grave Robber's Chronicles?

" Ghost Soldiers Borrowing the Path " was a terrifying concept in Grave Robber's Chronicles. It referred to the ghost or zombie from the netherworld using the path to enter the world of the living to carry out grave robbing activities. This concept was described in the novel as a mysterious and dangerous natural phenomenon that often led to the failure of grave robbers or danger. In the novels, it was often explained as the rules of the netherworld that only those who passed specific rituals and tests could enter the living world. Tomb robbers often violated this rule and were punished.