Ceng Zi's wife went to the market, and her son went with her, crying as he walked. Mother said to him, "Go home. When I come back, I'll kill the pig for you." His wife came back from the market and Ceng Zi wanted to catch some pigs to kill them. His wife stopped him and said, "It's just a joke with the children." Ceng Zi said, "Never joke with children. Children are ignorant at first, so they should learn from their parents and listen to their instructions. Now if you lie to him, you are teaching your children to lie. If the mother deceives the child and the child does not believe the mother, it is impossible to teach the child well. " Ceng Zi then killed the pig.