Li, a gifted scholar in Qing Dynasty, was a scholar in Qianlong period. He suffered from scabies in his childhood private school and kept scratching his body with his hands during recess. The teacher deliberately teased him and took this opportunity to test his intelligence, so he sent a couplet for him to make. The first part is:
Tickle, tickle; Do not itch, do not scratch, do not scratch; The more itchy, the more itchy.
Li Dongyang Yuan Tiao was witty, and then he made a bottom line:
Life and death, death and life; There is life and death, and there is death and life; Sir dies first, sir.
The teacher wanted to make fun of the students, but Li put forward the theory that "the teacher dies first", which made the teacher laugh.