Keep your word.

"Zengzi Killed the Pig" is a story recorded in "Han Feizi".

Zengzi, named Shen, also named Ziyu, was one of the seventy-two sages among Confucius’ disciples. It is said that Zengzi’s wife went to market one day, and Zengzi’s son was crying and insisting on her going. She said to her son: "If you listen to me and go back, I will kill a pig for you when you come back." When the son heard this, he stopped crying and went back obediently.

Zeng Zi’s wife came back from the market. Zeng Zi went to the pigsty to catch the pigs and kill them. His wife stopped him and said, "Why do you take your childish words seriously?" But Zengzi said, "You are kidding, but children do not take it seriously. Children are not sensible and they learn from their parents. Today you deceived them. , is to teach him to deceive; and if you deceive him today, he will not believe you in the future, and you will no longer be able to educate him.

Zeng Zi finally killed the pig. This story is in history. He is regarded as a model of "teaching by example"