《元史·列传·卷三十七》
打败王可汗后，金人见派往王可汗的使臣耶律阿海久不回朝，便拘留阿海家属于瀛。
既败王可汗，金人讶其使久不还，拘家属于瀛。
After defeating King Khan, the Jin people saw that the envoy sent to King Khan, Yelv Ahai, had not returned to the imperial court for a long time, so they detained Ahai's family in Yingzhou.
<s>[INST] Convert the following English text into Classical Chinese: After defeating King Khan, the Jin people saw that the envoy sent to King Khan, Yelv Ahai, had not returned to the imperial court for a long time, so they detained Ahai's family in Yingzhou. [/INST] 既败王可汗，金人讶其使久不还，拘家属于瀛。</s>
Convert the following English text into Classical Chinese: After defeating King Khan, the Jin people saw that the envoy sent to King Khan, Yelv Ahai, had not returned to the imperial court for a long time, so they detained Ahai's family in Yingzhou.
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既败王可汗，金人讶其使久不还，拘家属于瀛。
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