Zēng Jiān 曾堅 (zì Zǐbái 子白; self-styled Cānghǎi yìlì 滄海逸吏, “Idle Officer of the Blue Sea”), YuánMíng transition scholar-official from Línchuān 臨川 (modern Fǔzhōu 撫州, Jiāngxī). He served as a jiānchá yùshǐ 監察御史 and Lǐbù shìláng 禮部侍郎 under the late Yuán court and later submitted to the rising Míng. He travelled by sea to the Yuán capital in the early 1360s on official business — a voyage that took him past the Sìmíng / Dàlán massif of coastal Zhèjiāng, prompting his composition of the preface to the Sìmíng dòngtiān Dānshān túyǒng jí KR5b0310, signed Zhìzhèng 21 / 10 / 1 (= 1361). He is identified in CBDB as id 35344 (dynasty Míng); a separate Sòng-period 曾堅 (id 25805) is a distinct person. Other surviving writings include prefaces collected in his Cānghǎi yìlìjí 滄海逸吏集 (lost; only fragments preserved through quotation).