Zhōu Yīng 周鑅, Qīng-era colleague of 王士雄 Wáng Shìxióng at the Chángshān 長山 medical circuit in the Dàoguāng era, fl. 1843. The signature of his postface to KR3eq009 Huíchūn lù 回春錄 (signed yúdì 愚弟 “your foolish younger brother”, Dàoguāng 23 = 1843) identifies him as a coeval-or-junior friend and clinical collaborator of Wáng during the latter’s early Hángzhōu years. Zhōu served as the editor-anthologist of Wáng’s first case-record compilation, taking Dīng Chángrú 丁長孺’s edition of Miù Xīyōng’s 繆希雍 cases as his explicit model. Not in CBDB; no further independent documentation located.