Rèn Qǐyùn 任啟運 (1670–1744), zì Yìshèng 翊聖, was a Yōngzhèng-Qiánlóng-period official and Yìjīng scholar from Jīngxī 荊溪 (Yíxīng 宜興, Jiāngsū 江蘇). He passed the jìnshì in Yōngzhèng guǐchǒu 雍正癸丑 = 1733 (relatively late, at age sixty-three) and held office through Vice-Director of the Imperial Clan Court (Zōngrénfǔ fǔchéng 宗人府府丞).
His main Yì work is the Zhōuyì xǐ xīn 周易洗心 (KR1a0153) in nine juàn (catalog meta records 7 juàn — recension discrepancy). The work is a substantial Qiánlóng-period chart-tradition commentary: at the head it provides a comprehensive collection of diagrams from Zhū Xī, Shào Yōng, Lǐ Guāngdì 李光地 (李光地), Hú Xù 胡煦 (胡煦), and others, plus diagrams of his own devising. Methodologically the work treats xiàng (symbol) as primary — readings derive from observing-symbol and savoring-words. The title alludes to the Xìcí’s shèng rén yǐ cǐ xǐ xīn 聖人以此洗心 (“the sage thereby washes his heart”); Rèn frames the Yì as the sage’s xǐ xīn book, against the simpler reading of the Yì as primarily a divinatory text.
His broader corpus includes the Lǐ jì zhāng jù 禮記章句 (a major Lǐjì commentary) and the Xiǎo Xué (小學) sub-canonical work.