"There are three kinds of unfilial piety, the greatest is not having offspring." This sentence is now generally understood by people as children, and they must continue to maintain the family's incense. Otherwise, it is unfilial, which is completely wrong. Original text: This sentence comes from "Mencius. Li Lou Shang". The original saying is "There are three kinds of unfilial piety. The greatest is not having an heir. Shun married without complaining, which is said to have no heirs. A gentleman thinks he still complains." Interpretation: It means being unfilial. There are many things (there are three theories, but Mencius said there are five unfilial piety), the most serious of which is failure to abide by the responsibility of future generations. Reason for crying: Shun got married without informing his parents, which meant he had no offspring, but a gentleman thought it was almost the same as informing him (because Shun was a monk outside the home, and Yao wanted to marry his daughter to him. In ancient times, there was a saying that the emperor was his parent) , Sanshun's father was very violent to him, but he was still very filial, so the gentlemen all thought the same). It has nothing to do with having children to renew the relationship.