Xǔ Héng 許衡 (1209–1281), zì Píngzhòng 平仲, hào Lǔzhāi 魯齋, posthumous title Wénzhèng 文正. Of Hénèi 河內 (modern Qìnyáng, north Hénán). CBDB id 10023. Yuánshǐ biography in juan 158.
The most distinguished early-Yuán Dàoxué statesman-scholar, foundational for Yuán-period Zhū-Xī-school canonization. Studied under Yáo Shū 姚樞 (1203–1280), the early-Yuán Dàoxué importer (who had brought Zhū-Xī-school Confucianism to the Mongol court via the captured Sòng scholar Zhào Fù 趙復). With Yáo Shū and Liú Yīn 劉因 (1249–1293), Xǔ Héng established the Yuán-period Zhū-Xī-school orthodox curriculum.
Career under Khubilai (Hubilie): summoned to court c. 1259; appointed Jīngzhàoyǐn 京兆尹 (Mayor of the Capital); various educational and ministerial posts. Final office: Jíxiándiàn dàxuéshì 集賢殿大學士 (Grand Academician of the Hall of Assembled Worthies) concurrent with Guózǐ jìjiǔ 國子祭酒 (Director of the Imperial Academy).
His pedagogical work two generations before substantively prepared the 1313 Yuán-period civil-examination canonization (kējǔ chì 科舉敕) — establishing the Sìshū (with Zhū Xī’s Jízhù) and the Wǔjīng (with Cài Shěn’s Shū jí zhuàn, Hú Ānguó’s Chūnqiū zhuàn, the ChéngZhū Yì-commentary, etc.) as the canonical-curriculum standard.
Within the Kanripo corpus he is the author of KR1a0068 Dú Yì sī yán 讀易私言 (1 juan; composed 1259–1281 during his Yuán-court tenure) — a methodologically self-contained essay developing the Xìcí’s six-line virtue-and-position doctrine into a systematic yìlǐ pedagogy.
Other surviving works: Lǔzhāi yíshū 魯齋遺書 / Lǔzhāi xīnfǎ 魯齋心法 (collected works), various jìn jiǎng 進講 (lectures-to-emperor) memorials.