Xǔ Yuèqīng, zì Tàikōng 太空 (later changed to Sòngshì 宋士, “Sòng officer,” in protest after the dynasty’s fall), hào Quántián zǐ 泉田子, was a native of Wùyuán 婺源 (then in Huīzhōu 徽州, modern Jiāngxī). He first received an attendant’s commission for military merit, then under Lǐzōng (1224–1264) was awarded jìnshì by virtue of having topped the Yìjīng examination at the Jiāngdōng court audience, and rose to Vice Director of the Zhèjiāng Western Transport. Summoned to the Imperial Library examination during Jiǎ Sìdào 賈似道’s chancellorship, he was dismissed for speaking out of agreement with him. He retired to his home in Wùyuán and “shut his door and wrote books” for the rest of his life. After the Sòng fall he refused to serve the Yuán and lived another ten years in withdrawal. Author of the Bǎiguān zhēn 百官箴 (KR2l0018) — a Sòng-era classicist literary admonition for the central government offices — and of poetic and philosophical works including Xiāntiān jí 先天集. A student of Wèi Liǎowēng 魏了翁 and friend of the loyalist Xiè Fāngdé 謝枋得. Lifedates 1216–1285 confirmed in CBDB and Sòngshǐ.