According to legend, the book Four-Share Pinghui Journal (Five Poor Books), compiled and annotated by Yu Chuntai, was compiled by Yu Chuntai in Qing Dynasty and awarded by Japanese officials in Ming Dynasty. The theory of this book is concise and to the point, and the truth is slight and obvious; Although it is established, it has the opportunity to change; Deep participation can lead to the source, and shallow participation can also be subtle. This is the standard of life. Now it has been recognized and commented by the numerology giant Mr. Xu, which is more convenient for scholars to study. There are four advantages of this book: First, based on the eight-character five-character behavior, it expounds that punishment meets punishment, without praise or derogatory, such as mourning pears, such as Bingzhou scissors, crisp and unambiguous. Secondly, according to the purpose of "access is more important than outline", it is said that the ten days of twelve months are orderly and orderly, and the readers pay a little attention to it, which means that they have answers. Third, taking the experimental life as an example, it is more obvious that there is no empty talk, and readers can rest assured to study it. Fourth, Mr. Xu is a great man in modern times. He reads widely and has a full stomach. Through his comments and examples, it is just the finishing touch.