Zhū Guāngfǔ 朱光甫, Yuán-period shùshì 術士 (technical specialist) in the nàyīn 納音 (sexagenary-cycle tonal assignments). Named by Wú Chéng 吳澄 (Wú Cǎolú 吳草廬, 1249–1333) as a competent expositor of the nàyīn theory. His treatise on nàyīn shìyì 納音釋義 — the assignment of the five-phase identifications to the sixty stem-branch combinations (e.g. Jiǎzǐ Yǐchǒu = Hǎizhōng jīn “Gold-in-the-Sea”) — survives only because 程林 Chéng Lín appended it to KR3eq088 Yīxiá zhīyán (early Qīng) as the most reliable account he had found. Not in CBDB.