The thirtieth of the thirty-six strategies in Sun Tzu's Art of War: Rebirth (easy to understand)

Originated from the legend of Tie Guai Li, one of the Eight Immortals. His soul left his body and played in heaven and earth. When Li Xuan came back, his body was gone, and his soul had no attachment. There happened to be a beggar who had just starved to death by the roadside nearby. His soul was possessed by a beggar and he was resurrected. 100 is too little to understand, that's all.