Late-Yuán / early-Míng recluse-poet of Jíshuǐ 吉水 (Lúlíng region, Jiāngxī). Style-name Yànzhāng 彥章; self-styled Jìngsī 靜思 (“Quiet Thought”). Of the family seat at GāocūnGuìlín 髙村桂林. The family Confucian lineage was grounded in Liú Zǐchéng 劉子澄 (the Jìngchūn 靜春 master) → and inherited the Zǐyáng (i.e. Zhū Xī) learning; descendants Guō Línjiàn 林磵, Xīchuāng 西牕, Dīxī 諟溪 in succession refined it. Guō Yù lived through the late-Yuán warfare in Jiāngxī, did not serve, and in xīnhài (1371, Hóngwǔ 4) was summoned by the Míng as xiùcái — he refused, citing deafness and lameness. He died in poverty after age 60 (his sixtieth-birthday poem dates to yǐmǎo = Hóngwǔ 8 = 1375; he survived several years more, dying probably in the 1380s). His Jìngsī jí 靜思集 (KR4d0568) is the surviving collection, transmitted privately within the Guō family until his eighth-generation grand-nephew Guō Tíngzhāo 郭廷昭 had it cut in print in the Jiājìng era (1561) under the editorship of the prominent statesman-scholar Luó Hóngxiān 羅洪先 of Niànān (Jíshuǐ kinsman, Jiājìng zhuàngyuán).