There are many ways to classify books. Generally speaking, libraries in China use China Library Classification.

Basic categories of China Library Classification;

I Marxism-Leninism and Mao Zedong Thought.

philosophy

Introduction to social science

Politics, law

E military

F economy

G. Culture, education, science and sports

H. Language and writing

I. Literature

J art

History, geography

Introduction to natural science

Mathematical science and chemistry

P astronomy

Q bioscience

R medicine, health

American agricultural technology

technology

U transportation

V. Aviation and aerospace

X. Environmental science

Z comprehensive books

On this basis, it is further subdivided according to the rules of China Library Classification. Some books may also cooperate with the five-digit four-corner numbering system. The classification label of general books includes classification number and year.

I hope the answer will help you ~ _