The Leishu zuanyao 類書纂要 "Most important references from all encyclopedias" is an encylopedia compiled by the Qing period 清 (1644-1911) scholar Zhou Lu 周魯, courtesy name Zhou Nanlin 周南林. The book was finished in 1664, is 33 juan "scrolls" long and includes 32 chapters. The quality of the book is not very high because the sources are not diligently indicated and the text contains many errors. The reason for this conditions is that the transmitted version was only a draft and not a finished manuscript. The Leishu zuanyao, nevertheless, can not be overlooked because it contains categories not included in other, better and more famous, encyclopedias, and quotes sources otherwise neglected, for example, in the chapters Sanjiao 三教 "The three teachings or religions" and Baigong 百工 "The hundred arts and crafts".
Li Xueqin 李學勤, Lü Wenyu 呂文鬰 (1996). Siku da cidian 四庫大辭典, Changchun: Jilin daxue chubanshe, vol. 2, p. 2063.
Zhao Hankun 趙含坤 (2005). Zhongguo leishu 中國類書, p. 371. Shijiazhuang: Hebei renmin chubanshe.