1, Library Classification of China, referred to as Chinese Library Classification, is now the fifth edition, including Marxism-Leninism, Mao Zedong Thought, philosophy, social sciences, natural sciences and comprehensive books;

2. The 22 basic categories are Marxism–Leninism, Mao Zedong Thought, Deng Xiaoping Theory, philosophy, religion, social science, law, military, economy, culture, science, education, sports, language, literature and art, history, geography, natural science, mathematical science and chemistry, astronomy, earth science, biological science, medicine, health and agricultural science.

3. Classification rules are basic hierarchy method, interdisciplinary positioning method, literature inheritance method, sorting order method, shelving parity method, classification number, pure digital code classification and English digital code classification.