Da Xue was originally an article in the Book of Rites, which had never been published separately before the Southern Song Dynasty. It is said that it was written by Confucius' disciple Zeng Shen. From the Tang Dynasty when Han Yu and Li Ao upheld orthodoxy and praised The Great Learning and The Doctrine of the Mean, to the Northern Song Dynasty when two brothers, Cheng Yi and Cheng Hao, praised and publicized it in various ways, and even called it The Great Learning, Confucius' suicide note, they became beginners of virtue. In the Southern Song Dynasty, Zhu inherited Cheng Zhu's thoughts, and also extracted Daxue from The Book of Rites, which was juxtaposed with The Analects of Confucius, Mencius and The Doctrine of the Mean, and became one of Zhu's four books when he wrote Notes on Four Books. According to Zhu and Cheng Yi. Fa, "Da Xue" is a suicide note left by Confucius and his disciples, and it is a popular reading of Confucianism. Therefore, Zhu listed it as the first of the "four books". There are more than ten idioms in the university. Here, choose nine. Learn from things and make the best use of them. Stop at the best and be sincere. There is a way to make money, and ten eyes can see it. In and out, ten fingers. Absent-minded, broad-minded and fat.