Mid-Qīng (late-Qián-lóng / Jiāqìng / early-Dào-guāng) physician of Hǎilíng 海陵 (Tàizhōu 泰州, Jiāngsū). Known principally through the preface of his maternal grandson Chén Zhào 陳照 (dated Xiánfēng 4 / 1854) to the recut edition of his sole documented work, KR3er101 Yīxué jíyào 醫學輯要 (in four juǎn, first printed at Hǎilíng in Wú’s own lifetime, recut by Chén Zhào in 1854). The work is a systematic clinical handbook anchored in the classical four-fold wàngwénwènqiē diagnostic method, with particular detail on visual diagnosis and pulse-taking. Best known by his zì Xiǎoshān 小珊. Not in CBDB. Note: not to be confused with the more famous Wáng Shìxióng 王士雄 Wú Xiǎoshān 吳小山, fl. mid-19th-c.