After Cao Pi became the crown prince, Xing Yong was selected by Cao Cao to be Cao Pi's teacher. In addition to Xing Yong, Cao Cao also sent Bing Yuan, who was "moral and pure, determined and loyal" and "a national treasure", and Zhang Fan, whom he respected very much, to assist Cao Pi. Cao Cao said to them politely, "My son If he is not successful, I am afraid that it will be difficult for him to take the right path, so I would like to ask you to correct him and encourage him. "If you don't follow the rules, you can't make a circle." Cao Cao knew this well. Once, Cao Cao asked Cao Zhang to lead an army on an expedition. Before leaving, he warned Cao Zhang: "At home, you are a father and son, and when you are doing things, you are a king and a minister. You must abide by the king's law when dealing with others. You must be careful!" The implication is that even if you are a general, Outside, everything must be done according to the rules. Otherwise, don't blame me for not respecting the relationship between father and son.

In order to encourage children to study hard, he once issued the "Zhu'er Order" to engage in competition: "Although children see love when they are young, when they grow up and become good, they must use it. I have nothing to say. Not only is it not selfish, "O minister, my son doesn't want to have any selfish interests." It means that when my sons were young, I liked them all, but when they grow up, I will use their talents according to their talents and do what they say. I am not partial to my subordinates, and I am fair to you. Only the most talented people are worthy of being my successors. Cao Cao’s tutoring experience is worth learning from.