Mid-Táng (WǔZhōu / Kāi-yuán-era) imperial-court Buddhist scholar-monk; zì Dàzhì 大智, commonly Dàzhì Dàoyīn 大智道氤. Lifedates 668 – 740-08-16, age 73. Title Chì suíjià jiǎnglùn shāmén 勅隨駕講論沙門 (“By imperial command, doctrinal-lecturer accompanying the imperial entourage”) — i.e., one of the imperial-court palace lecturers under the Xuánzōng establishment. His sole extant Vajracchedikā commentary, Yùzhù Jīngāng bānruò bōluómì jīng xuānyǎn 御注金剛般若波羅蜜經宣演 (KR6c0105, T85 no. 2733; preserved as a Dūnhuáng manuscript), is a doctrinal exposition (xuānyǎn 宣演) of Emperor Xuánzōng’s imperial annotation KR6c0100 — making it both a lecturer’s gloss on the imperial text and an authoritative exposition of the Vajracchedikā in its own right. The combination of imperial-annotation + monastic-exposition (yùzhù + xuānyǎn) is a distinctive Kāiyuán scholastic genre.