Zhōu Bǐngkuí 周秉奎 (zì Yízhēn 頤貞), late-Qīng physician of three decades’ clinical practice who in 1861 (Xiánfēng 11, xīnyǒu) wrote the first postface to KR3eq015 Yīyuán of 石壽棠 Shí Shòutáng, urging its first print run.