Late Northern Sòng / early Southern Sòng antiquarian and calligraphic-and-pictorial connoisseur; zì Yànyuǎn 彥遠, a man of Dōngpíng 東平 (titled “Guǎngchuān” 廣川 after the clan seat). Active in the Zhènghé 政和 (1111–18) through Jìngkāng 靖康 (1126–27) decades. Held office as Huīyóugé dàizhì 徽猷閣待制 under Huīzōng; later as Sīyè 司業 of the Imperial Academy; collaborated with the Jīn puppet emperor Zhāng Bāngchāng 張邦昌 in 1127, an act that earned him lasting censure (Dīng Tèqǐ’s Gūchén qìxuè lù). Author of KR3h0028 Guǎngchuān shūbá 廣川書跋 (colophons on calligraphic stelae) and KR3h0029 Guǎngchuān huàbá 廣川畫跋 (colophons on paintings) — both foundational documents of Chinese epigraphic and pictorial connoisseurship, alongside the parallel work of Huáng Bósī 黃伯思.