Zhāng Zǐchōng 張子充, Northern-Sòng physician of the Xīnān 新安 (Huīzhōu) Zhāng house, great-great-uncle of 張杲 Zhāng Gǎo (author of KR3eq024 Yī shuō); trained under 范純仁 Fàn Zhōngxuān and served at the Sòng capitals, founding the family medical tradition continued over three generations.