Late-Míng (Chóng-zhēn-era) Buddhist monk, sobriquet Yùnxū 蘊虗 (“Aggregate-Empty”); abbot of the Chóngfú Ān 崇福菴 at Wǔyuán 武原 (modern Hǎiyán 海鹽 in Jiāxīng, Zhèjiāng). Lifedates unrecorded; only certain literary act is the Jīngāng jīng bǐjì 金剛經筆記 (KR6c0066, X25 no. 478), self-prefaced Chóngzhēn 10 = 1637. The preface to that work, by an admiring lay correspondent, characterizes Rúguān as 履踐真實，貌癯趣澹，道風肅然 (“treading the truth, gaunt of countenance and bland of taste, of austere dharmic bearing”) and notes a circle of fācóng 白法琮公 in mutual admiration. Beyond this, no biographical record survives.