Introduction to book classification:

I Marxism-Leninism, Mao Zedong Thought and Deng Xiaoping Theory.

Philosophy, religion

Introduction to social science

Politics, law

E military

F economy

G. Culture, science, education and sports

H. Language and writing

I. Literature

J art

History, geography

Introduction to natural science

Mathematical science and chemistry

P astronomy, earth science

Q bioscience

Medicine and health

American agricultural science

technology

U transportation

V. Aviation and aerospace

X environmental science, labor protection science (safety science)

Z comprehensive books