The Kunxue jiwen is a collection of essays written by the late Song period 宋 (960-1279) scholar Wang Yinglin 王應麟 (1223-1296). Wang Yingling spent more than twenty years of private life to the compilation of a enormous amount of books on statecraft, like the encyclopedia Yuhai 玉海. Wang Yinglin was known as a universal scholar expert in a lot of different fields with a deep understanding of all matters of antiquity and contemporary affairs. In his own words, he made greatest efforts to overcome the difficulties of distinguishing himself from the masses by learning everything he was able to.
The 8 juan "scrolls" long Kunxue jiwen is structured like an encyclopedia. It begins with comments to the Confucian Classics, goes on to calendar, geography and the masters and philosophers, history, and end with literature and belles-lettres. Wang Yinglin quotes a lot of old sources and comments on errors in his source texts. He even points out a lot of errors in the writings of the Neo-Confucian master Zhu Xi 朱熹. The Kunxue jiwen is therefore an important early critique towards the transmitted books of the Song period Neo-Confucians. His textual critique is made with great care and very reliable.
The Kunxue jiwen was finished after the end of the Southern Song period 南宋 (1127-1279) and was printed during the Yuan period 元 (1279-1368) by Mou Yinglong 牟應龍 and Yuan Juexu 袁桷序. During the Qing period 清 (1644-1911)
a lot of scholars commented the Kunxue jiwen, like Yan Ruoqu 閻若璩, Quan Zuwang 全祖望, He Zhuo 何焯, Cheng Yaotian 程瑶田, Qian Daxin 錢大昕, Tu Jixu 屠繼緒, Wan Xihui 萬希槐, Weng Yuanqi 翁元圻, Zhao Jingxiang 趙敬襄 and Zhang Jialu 張嘉禄. The Kunxue jiwen in included in the collectanea Sibu congkan 四部叢刊, Sibu beiyao 四部備要, Siming congkan sanbian 四明叢刊三編 and Siku quanshu 四庫全書. The commentaries of Yan Ruoju, Wang Zhuo and Quan Zuwang are united in the edition of the collectaneum Zhaoshi cangshu 趙氏藏書. A modern edition was published in 1959 by the Shangwu yinshuguan press 商務印書館.
Source: Li Xueqin 李學勤, Lü Wenyu 呂文鬰 (1996). Siku da cidian 四庫大辭典, vol. 2, p. 1923. Changchun: Jilin daxue chubanshe.