Yáng Yúnfēng 楊雲峰 (fl. mid-19th century, circa Dàoguāng – Tóngzhì), Qīng physician of Wúxiàn 吳縣 (Sūzhōu, Jiāngsū). Inherited the family medical tradition from his father (who, in the preface, supplies the guiding instruction that “Jīn jìng 三十六舌 — Áo’s 36-figure scheme — should be taken in its spirit, not its letter”) and developed an independent doctrine of tongue diagnosis explicitly framed as a critical extension of the Áo shì Jīn jìng lù KR3eb051 and a complement to the four-diagnostics scheme transmitted through the Bīnhú mài xué 瀕湖脈學 of Lǐ Shízhēn and the writings of Zhū Dānxī 朱丹溪.
Author of the Línzhèng yàn shé fǎ 臨症驗舌法 (KR3eb052, 2 juan, conventionally dated Tóngzhì 12 = 1873) — a systematic Qīng tongue-diagnostic manual organised by tongue colour (青 / 紫 hepatobiliary; 黃 splenogastric; 紅 cardiac-and-small-intestinal; 白 pulmonary-and-large-intestinal; 黑 renal-and-vesical), each colour analysed under the dual axes xū / shí 虛實 (deficiency / excess) and yīn / yáng 陰陽 (yin / yang), and matched to a canonical prescription. The work was later included in Péi Jǐngān’s 裴景安 Sānsān yī shū 三三醫書 (1924) and in 曹炳章 Cáo Bǐngzhāng’s Zhōngguó yī xué dà chéng 中國醫學大成 (1935–37), through which it became one of the most influential late-Qīng tongue manuals in Republican and modern zhōng yī training.
No CBDB record. No precise lifedates have been located.