"Dou Yanshan has a righteous side and is famous for teaching five children" comes from the San Zi Jing, which tells that Dou Yanshan's method of educating children is very good, and the five children he educated are very successful. At the same time, he became famous in the imperial examination.

It is the parents' fault that they only provide food and clothing for their children and have no good education. Only education, not strict requirements, is laziness as a teacher. It is very wrong for children to refuse to study hard. If a person doesn't study hard when he is young, and he doesn't know the truth of being a man and knowledge when he is old, it will be difficult to make a difference when he is old.