Yán Xiàozhōng 閻孝忠 (also written 閻季忠, zì Zīgōu 資鉤), Northern-Sòng physician of Xǔchāng 許昌 (Hénán). Direct disciple of Qián Yǐ 錢乙 (錢乙), the founding figure of post-classical Chinese paediatrics. After Qián Yǐ’s death in 1113, Yán Xiàozhōng undertook the compilation and editorial organisation of Qián Yǐ’s clinical doctrine, prescriptions, and case-histories into the three-juǎn Xiǎoér yàozhèng zhíjué 小兒藥證直訣 (KR3ej020), completed and prefaced in 1119 (Xuānhé 宣和 1). Yán is also conventionally credited with five prescriptions added to the work as supplements (Lóngnǎo gāo 龍腦膏, Zhīchǐ yǐnzǐ 梔豉飲子, Báihǔ tāng 白虎湯, Gōuténg gāo 鉤藤膏, Wèixiāng sǎn 魏香散). His preface to the work is one of the principal documentary witnesses to Qián Yǐ’s biography and medical doctrine. No CBDB record.