Mid- and late-Táng official and art historian; zì Àibīn 愛賓, from a Hédōng 河東 family of prime-ministerial rank. He was great-great-grandson of Zhāng Jiāzhēn 張嘉貞 (zǎixiàng under Mínghuáng), great-grandson of the Wèiguógōng Yánshǎng 延賞, grandson of the Gāopínggōng Hóngjìng 弘靖 (both Tóng pínɡzhānɡshì), and son of Wénguī 文規, Guāncháshǐ of Guìguǎn. The Zhāng family had assembled a calligraphy and painting collection over four generations on a par with the imperial library — a fact Yànyuǎn emphasises throughout his prefaces. In the Qiánfú 乾符 era (874–879) he rose to Dàlǐ qīng 大理卿. He compiled in succession the KR3h0008 Fǎshū yàolù (the indispensable Táng compendium of calligraphic literature, c. 847) and the KR3h0009 Lìdài mínghuà jì (847, the first systematic Chinese art history). Both works survived because of his inherited library and preserved much of the Liùcháo and Táng art-historical literature that would otherwise be lost. Standard biographies in Xīn Tángshū 200 and Jiù Tángshū 129.