Wú Táng 吳瑭 (1758–1836), zì Pèihéng 配珩, hào Jūtōng 鞠通, was a Huái’ān 淮安 (Jiāngsū) physician and one of the foundational figures of the late-imperial wēnbìng 溫病 (warm-disease) school. His Wēnbìng tiáobiàn 溫病條辨 (6 juan, 1798) systematized the diagnostic framework of “sānjiāo biànzhèng” 三焦辨證 (syndrome-differentiation by upper, middle, and lower jiāo) and remains the locus classicus of the wēnbìng curriculum in modern TCM. He stands with 葉桂 Yè Tiānshì, 薛雪 Xuē Xuě, and Wáng Shìxióng 王士雄 as one of the “Four Greats of Warm-Disease Medicine” (溫病四大家).