Lín Yì 林億 (fl. 1056–1068, 宋), Northern Sòng official-physician and the head of the imperial Bureau for Editing Medical Books (Jiàozhèng yīshū jú 校正醫書局), established under Rénzōng 仁宗 in 1057 and active through Yīngzōng 英宗 and the early Shénzōng 神宗 reign. Lín served as Cháosàn dàfu Guānglù qīng zhí Mìgé 朝散大夫光祿卿直秘閣, and led the collation team — Sūn Qí 孫奇, Gāo Bǎohéng 高保衡, Sūn Zhào 孫兆 — that produced the received recensions of the foundational classics of Chinese medicine: Huángdì nèijīng Sùwèn 黃帝內經素問 (KR3e0001), Língshū jīng 靈樞經 (KR3e0002), Nán jīng 難經, Shānghán lùn 傷寒論, Jīnguì yàoluè 金匱要略, Mài jīng 脈經, Zhēnjiǔ jiǎyǐ jīng 鍼灸甲乙經, Bèijí qiānjīn yàofāng 備急千金要方, Wàitái mìyào 外臺秘要, and others. The collation principles used by Lín’s bureau — comparison of multiple manuscript witnesses, philological correction of the base text, retention of variant readings in interlinear notes — set the standard for Sòng critical editing of the medical canon, and the Lín Yì recensions are the immediate ancestors of all later printed editions. He has no transmitted free-standing biography and his lifedates are unknown beyond the bureau’s active years.