Jiāng Hán 江涵 (hào Rìdūn 日敦, fl. late-Jiā-qìng to Dàoguāng era, c. 1780s–1850s), mid-Qīng physician. Originally held an official posting in Guǎngdōng (粵). On retirement (the bá by his disciple Hán Zhījī gives a jiǎshēn year — most plausibly 1824) he settled in Wúmén (Sūzhōu), at the Pànhuán 泮環 district, where he combined private medical practice with a literati retreat lifestyle. His Guǎng-dōng-period medical reputation was substantial; he was regularly called to summer practice in Jiāhé 嘉禾 (Jiāxīng) where in three or four months he could earn “a thousand pieces”, enough for a year’s living. Author of four medical works: Yījìng 醫鏡 (the only one printed in his lifetime, at Guǎngdōng), Línzhèng jiǎnyào 臨證簡要, Shàohuái jí 少懷集, and the Fèngshí zhǐyào 奉時旨要 (KR3eo008). No CBDB record. Principal disciple: Hán Zhījī 韓之畿.