Chén Huáng 陳潢 (1637–1688), zì Tiānyī 天一, hào Xǐngzhāi 省齋, of Qiántáng 錢塘 (Hángzhōu, Zhèjiāng), was the principal Yellow River engineering theoretician of the early Qīng. A mùbīn (private-secretariat advisor) without examination credentials, he was retained by the Kāng-xī-era Zǒnghé (Director-General of the Yellow River) 靳輔 (Jìn Fǔ) and is credited with the principal technical insights of Jìn’s three-tenure (1677–1681, 1684–1688, 1691–1692) Yellow River management campaign. The Kāngxī emperor, on his Southern Tour of jiǎzǐ (1684), conferred upon him the unprecedented honorary title of Cānzàn héwù ànchásī qiānshì (Examiner of River Affairs, Provincial Surveillance Commissioner Subordinate). His engineering doctrine, redacted by his friend 張靄生 as the 12-chapter Héfáng shùyán 河防述言 — appended to Jìn Fǔ’s Zhìhé zòujì shū (KR2k0076) — is the most original early-Qīng statement of adaptive Yellow River management theory. He died in 1688 in disgrace following the imperial inquiry that displaced Jìn Fǔ from the Zǒnghé post; he was rehabilitated posthumously and his role in early-Qīng Yellow River administration was acknowledged in the Sìkù compilation. CBDB id 81482 confirms 1637–1688.