China Library Classification, referred to as Chinese Library Classification. Including "Marxism-Leninism, Mao Zedong Thought, Philosophy, Social Sciences, Natural Sciences and Comprehensive Books", with 22 basic categories as follows: 1. Marxism-Leninism, philosophy, religion, social sciences, politics, law, military, economy, culture, science, education, sports, language, writing, literature, art, history and Deng Xiaoping Theory.