"The Doctrine of the Mean" is one of the important philosophical classics of Confucianism. According to legend, it was written by Sun Tzu Si, Confucius's son. It was originally an article in the "Book of Rites" and was extracted by Zhu Xi, a scholar in the Song Dynasty, as one of the "Four Books". "The Doctrine of the Mean" is the knowledge that "establishes the foundation of the world" in the "Classics" of traditional Chinese culture. Its core idea is the golden mean of self-cultivation and self-cultivation. The content involves many aspects such as conduct, moral standards, learning methods, etc. Therefore, it is not only a book of life, but also a comprehensive collection of self-cultivation. This product selects the classic content of "The Doctrine of the Mean" that is closely integrated with reality, conducts in-depth interpretations, and tells people that whether they are working, studying, living, or doing things, if they can follow the golden mean and be impartial, they will definitely gain something!