Yòuxuán zǐ 又玄子 (“Master Yet-More-Profound”) is the hào 號 of the otherwise unidentified Daoist who, on the zhòngchūn 仲春 second day of the xīnmǎo 辛卯 year of Dàdìng 大定 (1171, under the Jurchen-Jīn 金 dynasty), claims to have ascended in a dream to the Purple Palace (zǐfǔ 紫府), to have audienced Tàiwēi xiānjūn 太微仙君, and to have received from him the gōngguò gé 功過格 — the “table of merits and offences” — which he then set down on waking. The text he produced, [[KR5a0187|Tàiwēi xiānjūn gōngguò gé 太微仙君功過格]] (DZ 186 / TC 186), is the earliest preserved Daoist ledger of merit-and-demerit and the model for the very large MíngQīng gōngguò gé literature.
The author signs the preface “Yòuxuán zǐ from the Wúyōu xuān 無憂軒 of the Huìzhēn táng 會真堂 on Xīshān 西山” — Xīshān, in modern Jiāngxī 江西, lay outside the Jīn empire in 1171 (it was Southern-Sòng territory), so the toponymic anchor is fictive or aspirational. Akizuki Kan’ei 秋月觀暎, Chūgoku kinsei dōkyō no keisei 中國近世道教の形成 (Tokyo: Sōbunsha, 1978), 197 ff., has argued from the “Huìzhēn táng” reference that Yòuxuán zǐ was associated with the Jìngmíng 淨明 (“Pure-Brightness”) tradition that grew up around Xīshān in the Sòng — itself the ancestral site of Xǔ Xùn 許遜 and home of [[KR5b0570|DZ 561 Língbǎo jìngmíng huánghuái xìngxiū yàojué 靈寶淨明黃淮性修要訣]] and related works. No further biographical data is recoverable. No CBDB record.