A kind of book is a reference book that compiles some or all of the original materials of ancient books and arranges them by category or rhyme for people to consult. The quasi-books are a kind of encyclopedic data compilation in ancient China. It is named after its extensive content, extensive collection of books and classified editing. A reference book for classical literature, which collects data and is easy to find and quote. Its style includes two kinds: the comprehensive class that collects all the materials in one book and the professional class that collects only one material. Editing methods are generally classified and arranged by rhyme and word. The existing masterpieces include: Records of Arts and Literature in Tang Dynasty, Notes for Beginners, Magnolia in Peace in Song Dynasty, Yuan Gui in Bookstore, Yongle Grand Ceremony in Ming Dynasty, Integration of Ancient and Modern Books in Qing Dynasty, etc. Its value: First, it preserves a large number of precious materials close to the original works in ancient China, which are used for collating ancient books, searching poems and songs, and textual research on the origin of allusions and idioms; Secondly, the researchers directly provided the materials for special research. The so-called category book is a kind of reference book, which collects the information of various categories or a certain category, sorts it according to the category, and makes it easy to find and quote. Books are divided into three categories according to content and arrangement: semantic system, morphological system and phonological system. Semantic books are arranged according to the semantic categories of materials, such as astronomy, geography and personnel. Each department is divided into several sub-categories, for example, astronomy is divided into sun, moon, star, time and so on; Time is divided into spring, summer, autumn and winter. Most ancient books fall into this category. Among them, according to the range of materials, there are two kinds: comprehensive and specialized. A phonetic book is a phrase with two or four words extracted from ancient books. According to the rhyme of the last word, it is compiled into a rhyme, which is mainly used for compiling words and finding information sources in dictionaries. Such as Yun Fu in Yuan Dynasty and Pei Fu in Qing Dynasty. Xingtongshu is a kind of font classification, that is, the words composed of two words are classified into the same part of speech according to their last word, and the poetry articles containing this word are listed, such as the classification of parallel prose in Qing Dynasty. Its function is similar to that of a phonetic book. The originator of China's ancient books should be Wei's Huang Lan. According to "The Reflection of the Three Kingdoms, Wei Zhi Wendi", Wei Wendi Cao Pishi "made Confucianism write more than a thousand classics". This book has been lost for a long time, although there are some lost copies in later generations, but the number is small, it is difficult to get a glimpse of its whole picture. During the Six Dynasties, there were also many books, such as Xiuwen Temple written by Wu Ping, the late master of the Northern Qi Dynasty. Many volumes were lost, and they were taken by books in the Tang and Song Dynasties and have been lost so far. Another example is the Catalogue of the Same Surnames in Qi and Liang Dynasties, and Brief Introduction to the Liang Dynasty.