A scholar dies as a bosom friend, and a woman is her lover. I will repay the wisdom of the people. Generally speaking, men will sacrifice for those who know and appreciate themselves; A woman will dress up for someone who likes herself or someone she likes. "I will repay the wisdom of the people." This sentence has a historical allusion. Yu Rang was one of the The Four Assassins in the Spring and Autumn Period. He was the minister of the intellectual family of Jin and Qing Dynasty, and the intellectual patriarch was killed. In order to repay Zhi's kindness, Yu Rang repeatedly went to the toilet to swallow charcoal paint for assassination, and finally committed suicide.