Yù Zhèng 喻政 (fl. late Wànlì era, Míng), Míng prefectural-administrative official (Jùnbó / Prefect of an unnamed prefecture) and compiler of the Huīhòu fāng 虺後方 (KR3ed151) — an emergency-rescue formulary brought out as part of his prefectural-charity publishing program. According to the preface, the work’s origin lies in a family experience: Yù’s father had once been bitten by a viper (huī) and was saved by a formula transmitted by an extraordinary stranger; Yù subsequently expanded this experiential formula into a broader emergency-rescue compendium and published it for the benefit of his prefectural constituents who could not personally bring complaints to his hall. The work is a representative of the late-Míng prefectural-administrative charity-publishing tradition. Sparse further biographical record; not securely identified in CBDB.