Luò Téngfèng 駱騰鳳
Style name Mínggāng 鳴岡 (also Chūnchí 春池). Native of Shānyáng 山陽 (modern Huáiān 淮安, Jiāngsū). Born Qiánlóng 35 (1770); died Dàoguāng 21 (1841). CBDB c_personid 85653 confirms the lifedates. Jǔrén of Jiāqìng 9 (1804); never advanced to the jìnshì degree. Served briefly in minor educational posts (notably as Director of Studies at the Tàizhōu 泰州 prefectural school) but his career was essentially that of a private scholar in his native Shānyáng.
A central figure of the Huáinán mathematical milieu of the early Dàoguāng decades, working in the indigenous Chinese mathematical tradition. His principal mathematical work is the Yìyóu lù 藝游錄 (KR3fc080) — the collected mathematical writings, published posthumously in 1884 (Guāngxù 10) by his descendants. The collection covers the qiúyī shù 求一術 (Chinese Remainder Theorem) tradition extending 秦九韶 Qín Jiǔsháo’s Shùshū jiǔzhāng (cf. KR3fc008); the tiānyuán 天元 (celestial-element) algebraic apparatus; and various indigenous-tradition procedural-arithmetical methods.
Luò Téngfèng’s work belongs to the broader Jiā-qìng-to-Dào-guāng recovery of the indigenous Chinese mathematical tradition under the Sìkù and QiánJiā evidential projects. He was a correspondent of 李銳 Lǐ Ruì and other figures of the Yángzhōu / Sūzhōu mathematical circles, and his work was admired by 羅士琳 Luó Shìlín who praised him in Chóurén zhuàn xùbiān 疇人傳續編. The posthumous publication date of the Yìyóu lù (1884) explains the puzzling “1884” extent value in the catalog meta — which is the publication date rather than a quantity-of-text figure.