Cáo Xūn 曹勛 (1098–1174), zì Gōngxiǎn 功顯, hào Sōngyǐn 松隱, was a Southern-Sòng official and poet from Yángdí 陽翟 (modern Hénán). He took the jìnshì in Xuānhé 5 (1123). At the time of the Jīn capture of the Sòng capital Bīanjīng 汴京 in early 1127 (the Jìngkāng 靖康 catastrophe), he was one of only four court officials whom the Jīn permitted to remain in close attendance on the abdicated emperor Huīzōng 徽宗 in his northern captivity, and he served as the principal secret courier between Huīzōng and his son the future Gāozōng 高宗 — most famously by smuggling out an imperial calligraphy hidden in a silk collar. He escaped from the Jīn camp later in 1127 and submitted his eyewitness record, the Běi shòu jiànwén lù 北狩見聞錄 KR2e0011, to Gāozōng at the temporary capital Nánjīng 南京 in the seventh month of Jiànyán 2 (1128). His subsequent military and diplomatic career under Gāozōng was distinguished — he rose to Military Commissioner of Zhāoxìn 昭信軍節度使 and was a frequent envoy in SòngJīn diplomacy. His record is in the Sòngshǐ (juǎn 379). His literary works include the Sōngyǐn jí 松隱集 (collected poetry and prose) and various cí; his cí are preserved in the Quán Sòng cí 全宋詞.