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The Siku Quanshu, variously translated as the Imperial Collection of Four, Emperor's Four Treasuries, Complete Library in Four Branches of Literature, or Complete Library of the Four Treasuries, is the largest collection of books in Chinese history.
During the height of the Qing Dynasty in the 18th century CE, the Qianlong Emperor commissioned the Siku Quanshu to demonstrate that the Qing could surpass the Ming Dynasty's 1403 Yongle Encyclopedia, which was the world's largest encyclopedia at the time.
The editorial board included 361 scholars, with Ji Yun and Lu Xixiong (陸錫熊) as chief editors. They began compilation in 1773 and completed it in 1782. The editors collected and annotated over 10,000 manuscripts from the imperial collections and other libraries, destroyed some 3,000 titles, or works, that were considered to be anti-Manchu, and selected 3,461 titles, or works, for inclusion into the Siku Quanshu. They were bound in 36,381 volumes (册) with more than 79,000 chapters (卷), comprising about 2.3 million pages, and approximately 800 million Chinese characters.