Eastern-Hàn antiquarian of Kuàijī commandery 會稽郡 (modern Shàoxīng, Zhèjiāng), fl. mid-1st c. CE. Almost nothing is known of his career; his biography survives only as a cǎizì 採字 riddle in the closing Xù wàizhuàn 敘外傳 of the Yuè Jué Shū KR2i0002: “to take qù 去 as a surname, with yī 衣 to make it whole” 以去爲姓承之以衣 yields Yuán 袁; “the personal name has mǐ 米 covered with gēng 庚” yields Kāng 康; “Yǔ came east to inspect, and is buried at his marches” places him in Kuàijī. He compiled the Yuè Jué Shū on the basis of older Yuè-state records, and the work was finalized by his fellow-countryman 吳平. The lower bound of his floruit is fixed by the Wúdìzhuàn chapter’s reference to Jiànwǔ 建武 28 (= 52 CE), so the catalog meta of fl. 40 marks the working date of his redaction. CBDB id 45090 lists fl. 1004 as a guess; the historically defensible floruit is mid-first century. (CBDB id 85805, b. 1840, is a homonymous Qīng-period figure unrelated to the Hàn antiquarian.)