Zhāng Qí 張琦 (fl. late 18th c., 清), native of Yánghú 陽湖 (Chángzhōu prefecture, Jiāngsū). Wrote the 後序 (postface) preserved in the standard edition of 黃元御’s Chángshā yàojiě 長沙藥解 (KR3ec064), explaining the Běnjīng / Shānghán relationship that motivates the work. The Qiánlóng-era Yánghú Zhāng Qí edition is the principal printing of the Chángshā yàojiě. No further biographical detail securely attested; no CBDB record located.