Xú Jīng 徐兢 (1091–1153 per CBDB 3378; catalog meta 1093–1155 followed CBDB here), zì Míngshū 明叔, hào Zìxìn jūshì 自信居士; native of Ōuníng 甌寧 in Mǐn (modern Fújiàn). Northern-and-Southern-Sòng calligrapher, painter, and diplomat. Held office as Fèngyì láng under Huīzōng. In Xuānhé 6 (1124) selected as Tíxiá rénchuán lǐwù guān in the embassy to Koryŏ — an embassy in which he was specifically requested by the Koryŏ court for his calligraphic skill, headed by ambassador Gěishìzhōng Lù Yǔndí 路允迪. On returning, presented the Xuānhé fèngshǐ Gāolì tújīng 宣和奉使高麗圖經 (KR2k0138); received in audience by Huīzōng, granted the equivalent of jìnshì status, promoted Zhī Tàizōng zhèngshì with concurrent care of the Shūxué; later transferred to Shàngshū xíngbù yuánwài láng. His unique zhuàn (small-seal) calligraphic style — departing from the Shuōwén jiězì tradition — is criticised by Wèi Liǎowēng’s Hèshān jí but not preserved in any known calligraphic specimen. Note: the Wénxiàn tōngkǎo incorrectly identifies him as a descendant of Xú Xuàn 徐鉉 (the Five-Dynasties / early-Sòng philologist of the Shuōwén); Wáng Zhì’s Mòjì records that Xú Xuàn had no son, and the descent error is corrected by the Sìkù tíyào. CBDB id 3378.