Yú Shí 于石 (lifedates uncertain, fl. late-Sòng / early-Yuán; conventional dates c. 1247–1305), zì Jièwēng 介翁, hào Zǐyán 紫巖 (after his place of residence), later Liǎngxī 兩谿 (after moving into the prefectural town of Lánxī), native of Lánqī 蘭谿 (modern Lánxī in Wūzhōu / Jīnhuá, Zhèjiāng). Refused all Yuán recruitment after the Sòng fall in 1276 and lived as a private literatus in Lánxī. The Zhèjiāng tōngzhì enters him both in the Wényuàn and the Yǐnyì sections of the prefectural biographies, “deserving both.” His selected poetry was edited posthumously by his disciple Wú Shīdào 吳師道 (1283–1344, one of the Jīnhuá sì xiānshēng and the great Yuán commentator on Zhànguó cè) as the Zǐyán shī xuǎn KR4d0410 in three juàn (200 gǔjīntǐ pieces). CBDB person 35296.