Shī Chéngzǐ 師成子 (fl. early Kāngxī, late 17th c., 清) was a Daoist fāngshì 方士 (technician of alchemical and pharmaceutical arts) from Pǔdōng 蒲東 (i.e., east of the Yellow River in southern Shānxī, the old Pǔzhōu 蒲州 region), known almost exclusively as the author of the manuscript Língyào mìfāng 靈藥秘方 (KR3ed067) — a 1-juǎn collection of more than forty alchemical-pharmaceutical recipes (calcined and sublimed mineral medicines: hóngshēng 紅升 and báijiàng 白降 mercury preparations and the like, far in excess of what most physicians knew). His autograph copy of the manuscript was discovered in a market in Yángzhōu 揚州 (Guǎnglíng 廣陵) by Fāng Chéngpéi 方成培 (hào Yǎngsōng 仰松) in Qiánlóng jǐhài 己亥 (= 1779). Shī’s recipe-doses were given in deliberately obscured language (one = qí; three qián = rén), so the recipes were known but the practical dispensing-doses required decipherment. The work was printed at Hànhǎi 漢皋 (Wǔhàn) in Qiánlóng guǐmǎo 癸卯 (= 1783) by Wāng Yīgōng 汪圮公 from Fāng Chéngpéi’s restored manuscript. No CBDB entry; no other biographical information has been recovered.