Teaching a wife in "university" refers to teaching a wife and correcting her. The original text of "teaching a wife" in "University" is that people teach their children first, and people teach their wives first. Literally, when a child makes a mistake, he needs to be educated in the presence of others, while if his wife does something wrong and needs to be criticized and corrected, he needs to be educated in the absence of others. "University" is an essay on Confucian thoughts of self-cultivation, governing the country and leveling the world. Originally the 42nd Book of Rites Dai Xiao, it is said that it was written by Ceng Zi during the Spring and Autumn Period and the Warring States Period. In fact, it is a Confucian work in the Qin and Han Dynasties, and it is an important work for China to discuss educational theory in ancient times.