Yú Yúnxiù 余雲岫 (real name 余巖 Yú Yán, 1879–1954), Republican-era Western-trained physician and prominent anti-Zhōngyī polemicist. Author of the Língsù shāngduì 靈素商兌 (1917) and proponent of the 1929 motion before the Nationalist Ministry of Health to abolish the practice of traditional Chinese medicine — a proposal that catalysed the Republican-era institutional defence of Zhōngyī (cf. 張贊臣 Zhāng Zànchén, 嚴蒼山 Yán Cāngshān, and others).