What do you mean by class books and series books and classes here?

Category book is an encyclopedia of ancient China. Its compiling method is to compile books according to categories, that is, to disassemble all the books collected at that time and rearrange them according to categories or themes, so as to find them quickly when necessary. Because it is mainly arranged by class, it is called "class book". In Ming and Qing Dynasties, there were a few books classified by rhyme, such as Yongle Dadian in Ming Dynasty and Pei Yunwen Fu in Qing Dynasty, but the mainstream of books in previous dynasties was mainly classification.

Series plays an important role in China's classical literature and plays a positive role in preserving ancient book culture.

It is different from generic books: generic books are classified as reference books similar to today's encyclopedias on the basis of collecting a large number of documents; A series of books is a collection of books that originally belonged to a single book, compiled into a big book with a total title, and kept in complete sets for people to consult. There are many books in a series, including thousands. For example, the first edition of the series integration has 4 107 volumes. Only two books, such as Guo's Collection of Qin and Han Dynasties, and only two books, Sanfu and Xijing Miscellanies, were accepted.

In a word, the so-called "category" of "category book" means to take the meaning of classification and compilation; The so-called "cluster" of series means generalization, aggregation and numerous meanings.

Like Four Great Classical Novels, four books and five classics together are a set of books.