Yuán-period 元 Shàngshū commentator and pedagogue, native of Lúlíng 廬陵 (Jí’ān 吉安, modern Jiāngxī). Zì Zǐyóu 子由. Lifedates unrecorded; floruit defensibly mid- to late-fourteenth century. CBDB id 102027 has no firm dates. He produced jù jiě 句解 (“line-by-line glosses”) on all the canons (according to the Sìkù tíyào) — comprehensive beginner-oriented annotations of the Five Classics. Most are now lost; only the Shàngshū jù jiě 尚書句解 (KR1b0035) in 13 juǎn survives, in the Sìkù.
The work is explicitly aimed at “qǐdí yòuxué” 啟迪幼學 (“opening the path for young students”) and follows Cài Shěn (KR1b0017) wherever Cài provides a reading; it does not engage the HànTáng zhùshū tradition systematically and is sparse on míngwù xùngǔ 名物訓詁. Its principal pedagogical achievement, per the Sìkù tíyào, is making the notoriously knotty Yīn pán 殷盤 and Zhōu gào 周誥 chapters approachable through patient phrase-by-phrase parsing. The work belongs to the late-Yuán “lí jīng biàn zhì” 離經辨志 (parsing-the-text-and-distinguishing-the-aim) tradition of beginner-instruction commentary.