Yú Qīn 于欽 (1284–1333), zì Sīróng 思容, native of Yīdū 益都 (modern Qīngzhōu 青州 in central Shāndōng). Mid-Yuán scholar-official and the principal gazetteer-historian of Shāndōng. According to Sū Tiānjué’s 蘇天爵 preface to the Qí chéng, his career took him through three principal substantive offices: Yùshǐ xiàntái dōushì 御史憲臺都事 (Investigating Censorate clerk, in the central court), Zuǒsī yuánwàiláng 左司員外郎 (Vice Director of the Left Office), and finally Yīdū tiánfù zǒngguǎn 益都田賦總管 (Director of the Yīdū Land-Tax Bureau, his last and most relevant office). The Sìkù tíyào attributes him Bīngbù shìláng 兵部侍郎 (Vice Minister of War), perhaps reflecting a posthumous honorific or an error. He was earlier promoted from a yuán 掾 (clerkship) of the Southern Branch Censorate (Nán xíngtái yuán 南行臺掾).
His one surviving work is the Qí chéng 齊乘 (KR2k0026) in 6 juan plus Shìyīn 釋音 in 1 juan — a comprehensive gazetteer of Shāndōng (the “ancient state of Qí”), composed during his last years and published posthumously through the editorial hand of Sū Tiānjué (preface dated 1339). According to Sū’s preface, Yú died with an “impoverished household” and the manuscript was the principal item passed to his son Yú Qián 于潛. The Qí chéng is regarded as one of the finest evidentially-grounded regional gazetteers of pre-Míng China. CBDB: 100315.