Shěn Gǔzhāi 沈古齋 (zì Huàsān 化三, fl. mid – late 19th c., Pítǒng 郫筒 / Píxiàn 郫縣, Sìchuān) — late-Qīng Sìchuān physician within the 鄭欽安 Zhèng Qīnān circle. Author of one of the 1874 prefaces to Zhèng’s Yīfǎ yuántōng (KR3er080), dated Tóngzhì 13, pújié yuè 蒲節月 (Dragon-Boat month). Not in CBDB.