Tiěfēng jūshì 鐵峰居士 (“Lay Practitioner of Iron-Peak”), pseudonymous yǎngshēng compiler of the early Míng, of Gǔ Nánshā 古南沙 (probably Shāzhōu 沙洲 = modern Chángshú in Jiāngsū). Active in the Hóngzhì to Zhèngdé transition: in autumn of Hóngzhì yǐchǒu = 1505 he encountered the Shèngxián bǎoxiū tōngjiàn 聖賢保修通鑑 (a work since lost), of which he secretly transcribed an outline; after personal experimentation he expanded and corrected the material, producing the Bǎoshēng xīnjiàn 保生心鑑 (KR3eo041) with 32 illustrated dǎoyǐn figures. His preface is dated Zhèngdé bǐngyín (1506). True identity unrecovered. No CBDB record.