Tán Zhìguāng 譚志光 (hào Róngyuán 容園, fl. 1898–1927, 民國), Chángshā 長沙 (Húnán) physician active in the late-Qīng / Republican-period Húnán reform movement. Per Xióng Xīlíng’s 1927 colophon to the Zhēnjiǔ wèndá (KR3ee035), Tán was an inner-circle figure of the 1898 Chángshā reformist community alongside Kāng Yǒuwéi, Liáng Qǐchāo, and Tán Sìtóng; later, in the Mínguó 5 (1916) Chuánshān xuéshè 船山學社 reunion he was acclaimed by Liào Bǐtáng and others as a leading Húnán acupuncturist who had “revived medical learning and saved lives.” Author of the Zhēnjiǔ wèndá 針灸問答 (KR3ee035, 1927).