White Tiger Tong in the Eastern Han Dynasty records that there was a school for aristocratic children named Bi Yong at that time, and education was one of the contents of education. In the folk, sex education is often carried out in a suggestive way. There is a kind of porcelain called "box bottom". When the lid was opened, there were statues of a man and a woman. People usually put it at the bottom of the box to keep it from others. On the eve of their daughter's wedding, the mother will show her daughter and enlighten her husband and wife. And "dowry painting". When the daughter gets married, the parents put this picture scroll in the dowry, and the newlyweds put it on the bed and do it accordingly. In addition, some erotic paintings, tantric Buddha statues and folk songs also play the role of sex education. "I think there are too many self-righteous experts in Chinese studies in China, and they also mislead everyone with words.