During the Spring and Autumn Period ， prince Zhou Xu of the State of Wei killed his brother and became the new emperor. Zhou Xu was a tyrant1. He oppressed his people and indulged in wars of aggression2. By launching wars， he tried to divert the people's attention and reduce their discontent with him in order to consolidat his dictatorship.The Duke of the State of Lu leant about Zhou Xu's 3 plan， he asked a senior official， "What do you think about Zhou Xu's move? "The official answered， "He indulges in wars ， ， In addition， war is like fire. If one launches wars endlessly without restraint， he'll eventually burn himself. "Sure enough， the people of Wei with the help of the State of Chen overthrew4 Zhou Xu and killed him in less than a year.Later， it to mean that those who do evil will finally ruin themselves.