This sentence comes from "Three", which is a good way for Yanshan people to educate their sons in the Five Dynasties. The five sons he educated were very successful and made a name for themselves in the imperial examinations.

The story of Dou Yanshan is as follows:

Dou Yanshan, whose real name is Dou, is from Youzhou, Beijing. Legend has it that Dou Yanshan was wicked when he was young and childless at the age of 30. His father gave him a dream of "repenting quickly and doing good" and "turning over a new leaf". He kept the words in his dream in mind, so he helped the poor, traveled widely and conveniently, and accumulated great virtue. He gave birth to five sons, and he is a member of the same family. The eldest son yue yi, for does history; The second son, Yan Yan, assistant minister of rites; Three times, fill in the blanks; The fourth son said that he was a doctor's advice; The fifth son promised, and then an assistant minister, Feng Dao, offered a poem saying, "Yanshan fights to teach his son to be righteous." .

Note: The Amethyst is a traditional enlightenment textbook in China. Among China's ancient classics, Saint Amethyst is one of the most popular and understandable readers. The Classic of Three Characters draws on allusions, including literature, history, philosophy, astronomy and geography, ethical justice, loyalty and filial piety, etc. The core ideas of China's traditional culture include "benevolence, righteousness, honesty, respect and filial piety". While reciting The Amethyst, I learned common sense, Chinese studies and historical stories, as well as the truth of being a man and doing things in the story connotation.