Natural Science: These books are mainly about the theory and research of natural science, including mathematics, physics, chemistry, biology, astronomy, earth science and so on.
Agricultural Science: These books are mainly about the research and application of agricultural scientific theories, including agronomy, forestry, animal husbandry, aquaculture and so on.
Medicine: These books are mainly about the theory and application of medicine, including medicinal chemistry, pharmaceutical preparations, traditional Chinese medicine, biomedical engineering and so on.
Industrial technology: These books are mainly about the theory and application of industrial technology, including energy and power, machine building, petrochemical industry, building materials and so on.
Humanities and Social Sciences: These books are mainly about the theory and application of humanities and social sciences, including philosophy, religion, sociology, law, economy and literature.