Wú Yù 吳煜 of Cháchá 茶垞 (fl. 1793), late-Qiánlóng literatus and pharmacopoeia-knowledgeable layman; transcriber-collator and author of the second preface (dated Qiánlóng 58, 17th day of the 10th lunar month = late 1793) of the Nǚkē mìyào 女科秘要 (KR3ei020) — one of the privately-transmitted late-Qiánlóng editions of the Xiāoshān Zhúlínsì gynecological corpus. The preface was written at the Qīnghuī shūwū 清暉書屋 (Hall of Pure Brightness Studio).