. Erya can be regarded as the bud of books. The compilation of books began in Cao Wei of the Three Kingdoms, and the earliest recorded first book was Huang Lan in the first year of Huang Chu of the Three Kingdoms (2 2 0). Large-scale official books appeared in Sui and Tang Dynasties. There are many kinds of books in the Song and Yuan Dynasties, and the famous "Four Books in the Early Song Dynasty" appeared in the early years of the Northern Song Dynasty. During the Ming and Qing Dynasties, books tended to flourish and decline. The compilation of quasi-books in Qing Dynasty appeared an unprecedented situation. The style, variety and quantity of quasi-books are more detailed, and the retrieval is more convenient. It is a summary of the compilation achievements of ancient books, represented by ancient and modern book collections. After the middle of Qing dynasty, with the introduction of western culture and the rise of natural science, some things have been difficult to be summarized with simple things, and the editing and editing of such books has turned from prosperity to decline, gradually disappearing, lasting for more than 100 years.