Chén Shígōng 陳實功 (zì Yùrén 毓仁; hào Ruòxū 若虛, c. 1555 – c. 1636, 明), late-Míng surgical physician of Dōnghǎi 東海 / Nántōng 南通 (Jiāngsū). Author of KR3ek014 Wàikē zhèngzōng 外科正宗 (4 juǎn, 1617), the most influential Míng-period surgical text and the founding work of the so-called 正宗派 — the late-Míng surgical school that embraced active operative intervention with knife and cautery, in deliberate contrast to the later Qīng quánshēng pài of Wáng Hóngxù 王洪緒 KR3ek017 which would reject such methods. Chén’s clinical descriptions of nasal-polyp excision, cleft-lip repair, anal-fistula seton ligation, and breast carcinoma (rǔyán 乳岩) are among the most detailed pre-modern Chinese surgical operative records. The work’s wǔ jiè shí yào 五戒十要 (five prohibitions and ten essentials) integrates ethical reflection with Buddhist karma-and-illness doctrine. Lifedates 1555–1636 are an inference from his 1617 statement that he had practised for over forty years with white hair; no firm documentary evidence. Not in CBDB.