牛良祐 Niú Liángyòu Niú Liángyòu 牛良祐, Yuán-dynasty disciple of 竇傑 Dòu Jié (Dòu Hànqīng); prepared and printed his teacher’s Zhēn jīng zhǐnán 針經指南 (KR3ee017) in Yuánzhēn 1 (1295).