Book of Songs research works, referred to as "Confucius", * * * forty volumes. In the 16th year of Tang Zhenguan (642), one of the Five Classics Justice written by Confucius, Confucius and others was an official book issued at that time. Kong (574 ~ 648) was born in Hengshui, Jizhou. He worked as a doctor, secretary and winemaker in Guo Zi. At that time, Kong was appointed to preside over the Five Classics Justice because of his qualifications and status. Justice in Shi Mao was written by Wang Deshao and others, but Confucius always made it. The Justice of Mao Poetry is the reconciliation of Mao Zhuan and Jian Zheng. Biography, referred to as annotation, meaning sparse, collectively known as Mao Shi annotation. The General Catalogue of Sikuquanshu says: "Liu Zhuo's Yi Shu in Shi Mao and Liu Xuan's Yi Shu in Shi Mao are manuscripts, so they can integrate all kinds of characters, including ancient meanings, and people are no different in the Tang Dynasty." Explain the wide range of materials used in this book and its great influence in the Tang Dynasty. It contains various interpretations of the Book of Songs by scholars in the Han and Wei Dynasties, and brings together the achievements of scholars in the Jin, Southern and Northern Dynasties. Some places can put forward some new ideas, such as expressing doubts about Confucius' theory of deleting the Book of Songs in Historical Records, but his books follow the principle of "sparse without breaking notes" and fail to surpass Mao Zhuan and Jian Zheng. In terms of reconciliation, this book is full of superfluous words, which is also the same shortcoming of the generosity of the Tang people.
The popular version of Justice of Mao Poems is Notes to Thirteen Classics, among which Justice of Mao Poems by Ruan Yuan is the best, followed by a collating draft of Justice of Mao Poems by Ruan Yuan.