Zhū Yuányù 朱元育 (fl. mid-to-late 17th century), hào Yúnyáng dàorén 雲陽道人 — early-Qīng Lóngmén Daoist nèidān expositor. He received early instruction from a Northern-school master Zhāng Bìxū 張碧虛 — described in his self-preface as the master who pointed him to the xuán guān (mystery-pass) — and after extensive travel met Língbǎo lǎorén 靈寶老人 in the depths of the Zhōngnán Mountains, from whom he received the final mind-and-easement transmission. His major works are the Cān tóng qì chǎn yōu 參同契闡幽 (KR5i0037) — drafted in 1657 (丁酉) at his Huáyáng retreat with disciple Pān Jìngguān 潘靜觀 — and the Wù zhēn piān chǎn yōu 悟真篇闡幽 (KR5i0059). Zhū’s commentaries are among the most influential early-Qīng nèidān readings of the Cān tóng qì and Wù zhēn piān; they cycle through the standard southern-school three-gate (yùzhèng / yǎngxìng / fúshí) and three-house (yàowù / lúdǐng / huǒhòu) categories. No CBDB record located.