Cáo Yuánhéng 曹元恆, late-Qīng Sūzhōu Wúxiàn 吳縣 physician, active in the Guāngxù era. Wrote the 1890 preface to KR3eq006 Yèxuǎn yīhéng recovered in the 繆萼聊 Miù Èliáo 1894 printing, lamenting the Tàipíng-era destruction of medical printing-blocks at Sūzhōu (the Géngshēn zhī biàn 庚申之變, 1860).