Complete Library of the Four Treasuries Siku Quanshu: The largest collection of books in Chinese history, commissioned by the Qianlong Emperor (r. 1735–1796). It aimed to catalog and preserve the vast intellectual heritage of China across four main categories.

Masters’ Section Zibu: The third of the four traditional divisions of the imperial library. This section includes works on philosophy, religion, military strategy, medicine, astronomy, and the arts—essentially the "Masters" or specialists of various fields of study.