I. Marxism–Leninism, Mao Zedong Thought and Deng Xiaoping Theory; Philosophy and religion; Introduction to social science; D. politics and law; E military; F economy; G. culture, science, education and sports; H. language and writing; First, literature; J art; K history and geography; Introduction to natural science; Mathematical science and chemistry; P astronomy, earth science; Biological sciences; R. medicine and health; Agricultural science; T industrial technology; U transportation; V aviation and aerospace; X. Environmental science and safety science; Z comprehensive books.

library

A library is an institution that collects, sorts out and collects books and materials for people to read and refer to. As early as 3000 BC, libraries appeared. Library has the functions of preserving human cultural heritage, developing information resources and participating in social education.