Xú Tíngyuán 徐庭垣 (early-to-mid Qīng), native of Xiùshuǐ 秀水 (Jiāxīng 嘉興 prefecture, Zhèjiāng), held office as assistant magistrate (縣丞) of Xīnchāng 新昌 county. His birth and death dates are not on record. Zhū Yízūn’s Jīngyì kǎo 經義考 (1701) does not list his name, and the Sìkù editors infer that Chūnqiū guǎn kuī 春秋管窺 (KR1e0106) was completed too late for Zhū to have seen it — placing his floruit roughly in the late seventeenth or early eighteenth century. The Sìkù editors group him with Jiāo Yuánxī 焦袁熹 (KR1e0108) as one of the most distinguished early-Qīng Chūnqiū commentators outside the high-profile Hànlín / jīngshī circle.