Shòuyín 瘦吟 (“the Thin Chanter”), Dào-guāng-era physician of otherwise unrecovered real-name identity. Attested only via the self-preface of KR3eq096 Shòuyín yīzhuì 瘦吟醫贅 dated to Dàoguāng 19 = 1839 chóngjiǔ (Double-Ninth day). By his own account he had practised medicine for forty winters-and-summers by that date — implying he commenced study c. 1800 and was probably born in the 1770s–80s. Doctrinal commitments — Yángmíng wèi primacy in the Shānghán system, deep engagement with Kē Qín — place him in the early-Dào-guāng JiāngSū / Zhèjiāng medical scene, contemporary with 李冠仙 Lǐ Guànxiān. The hào is otherwise unattested; no standard biographical record located. Not in CBDB.