A war is cruel anytime. What will a person do when he recognizes his antagonist is the person who has been close with him in the past? There is a dilemma.
In 559 B.C., Wei Xian-Gong, a monarch of Wei State, was expelled because he treated his ministers irreverently. Sun Linfu, an influential minister who led the coup, sent Yingong Tuo and Yugong Chai to pursuit Wei Xian-Gong. Gongsun Ding, a relative of the monarch, drove the chariot for Xian-Gong.