Wèi Héng 衛恆 (?–291), zì Jùshān 巨山, of Ānyì 安邑 in Hédōng 河東 (modern Yùnchéng 運城, Shānxī). Western-Jìn calligrapher and scholar-official; second son of Wèi Guàn 衛瓘 (the great Western-Jìn senior minister and Imperial Secretariat colleague of Suǒ Jìng 索靖), nephew of Wèi Jì 衛覬, paternal uncle of Lady Wèi 衛鑠 (衛鑠, the calligraphy teacher of Wáng Xīzhī). The Wèi-shi of Hédōng formed the most important calligraphic lineage of the WèiJìn period, transmitting both the zhāngcǎo and the early standard-script tradition. CBDB id 112183 records him under Western Jìn but supplies no lifedates; the standard Jìn shū 36 biography (appended to the biography of Wèi Guàn) records his death in Yǒngpíng 1 (291) at the hands of the Jiǎ 賈 faction, killed alongside his father in the political purge that opened the Bāwáng zhī luàn 八王之亂.
Held the offices Mìshū chéng 秘書丞, Tàizǐ shèrén 太子舍人, and Huángmén shìláng 黃門侍郎. He inherited his father’s mastery of cǎoshū 草書 and was particularly noted for gǔwén 古文 (archaic script) and zhāngcǎo 章草. His one surviving prose work — the Sìtǐ shūshì 四體書勢 (KR3h0092) — is preserved entire in Jìn shū 36 and is the principal premodern Chinese source on the early history and theory of the four script-types (gǔwén, zhuàn, lì, cǎo). The Sìtǐ shūshì incorporates verbatim the earlier rhapsodies of Cuī Yuàn 崔瑗 (Cǎoshū shì), Cài Yōng 蔡邕 (Zhuàn shì and Lì shì), and Wèi Héng’s own Gǔwén shì — making it the single most important transmission point for second-and-third-century calligraphic theory, almost all of which would otherwise be lost.
Wèi Héng’s authority rests largely on this preservation work: through him the Wèi-shi family transmission carried the late-Hàn calligraphic theoretical inheritance into the Eastern Jìn, where Lady Wèi (his niece) brought it to Wáng Xīzhī, and from there to the entire SòngYuánMíng fǎtiē tradition.