徐巖 Xú Yán Xú Yán 徐巖 (late Yuán – early Míng), Jiāngxī 江西 acupuncturist; the teacher of 徐鳳 Xú Fèng (compiler of the Zhēnjiǔ dàquán 針灸大全, KR3ee002, 1439). No independent biographical record survives; he is known only through Xú Fèng’s preface.