Zhèng Qīnān 鄭欽安 (míng Shòuquán 壽全, zì Qīnān 欽安, 1804–1901, Línqióng 臨邛 / Qióngzhōu 邛州, Sìchuān) — late-Qīng physician of Chéngdū; founder of the Huǒshén pài 火神派 (“Fire-Deity School”) of Sìchuān medicine. The signature clinical position is that all serious disease is at root yángxū 陽虛 — depletion of the pre-celestial yang at the Mìngmén 命門 — and the corresponding therapeutic strategy is large-dose warming-and-tonifying with fùzǐ 附子 (aconite), gānjiāng 乾薑, and guìzhī 桂枝, often at heroic doses that earned Zhèng the nickname Fùzǐ Zhèng 附子鄭 (“Aconite Zhèng”). Three principal works: Yīlǐ zhēnchuán 醫理真傳 (1869, doctrinal foundation); Yīfǎ yuántōng 醫法圓通 (KR3er080, 1874, clinical-method elaboration); Shānghán hénglùn 傷寒恆論 (Zhèng’s Shānghán lùn commentary). The Huǒshén pài has had a vigorous 20th- and 21st-c. revival in PRC TCM under Lú Chónghàn 盧崇漢, Wú Pèihéng 吳佩衡, and Fàn Zhōnglín 范中林. Not in CBDB.