What do you mean by teaching in jy, Li Kui?

The teaching of Li Kui jy, the misleading son, originated from the Water Margin. In the Water Margin, Li Kui jy was generous and had high martial arts skills, while Li Kui jy's cultural level was low, which made a joke. On one occasion, Li Kui jy tried to teach Yan Qing to read and write, but instead of teaching the church, Yan Qing was even more confused. Therefore, people use Li Kui jy to describe those ignorant but self-righteous people who mislead their children.