Yáng Shìyíng 楊士瀛 (zì Dēngfù 登父, hào Rénzhāi 仁齋, fl. Jǐngdìng / Xiánchún reigns, 1264, late 南宋), Southern-Sòng physician of Fúzhōu 福州 (Fújiàn). Author of the comprehensive medical compendium Rénzhāi zhízhǐ 仁齋直指 (KR3e0045, 26 juan in 79 entries, completed Jǐngdìng jiǎzǐ = 1264) — a major synthetic exposition of Sòng medicine drawing on the classical canon and the Three-Causes school of Chén Yán; and the Shānghán lèishū 傷寒類書 (also catalogued as part of KR3e0045 in some recensions, 7 juan, completed before the Zhízhǐ). His earlier works include the Huórén zǒngkuò 活人總括 and the Yīng’ér zhǐyào 嬰兒指要*. The Míng physician 朱崇正 Zhū Chóngzhèng (zì Zōngrú 宗儒, of Huīzhōu) added supplementary entries (附遺 fùyí “appended-supplementaries”) in his Jiājìng-period reprint, the SKQS-base recension. Yáng has no further transmitted biographical record.