Yú Zhèn 俞震, zì Dōngfú 東扶 (c. 1709–1793), native of Jiāshàn 嘉善 (Zhèjiāng). A leading mid-Qīng critical anthologist of Chinese medical case-records. His principal work, Gǔjīn yīàn àn 古今醫案按 (KR3ep071; preface 1778), selects representative cases from antiquity through the early Qīng and adds ànyǔ 按語 (critical evaluations) to each, modelled methodologically on the great Míng anthology Míngyī lèiàn 名醫類案 but with a sharper critical voice. Yú is conventionally regarded as the founder of the yīàn àn (commented case-record) sub-genre, later continued by Wèi Zhīxiù’s Xù míngyī lèiàn (KR3ep017) and Wáng Shìxióng’s selection (KR3ep072).
Most of Yú’s other clinical material was destroyed in the Tàipíng wars (1850s–60s); fragmentary survivals are preserved in KR3ep051 ShěnYú yīàn héchāo. Not securely identified in CBDB — the several entries under c_personid 271853, 583979, 583980, 692761 do not carry confirming dates.