《新五代史·本纪·晋本纪第九》
十九日，派牛羊使董殷出使契丹。
己亥，牛羊使董殷使于契丹。
On the 19th, Dong Yin was sent as an envoy to the Khitan with cattle and sheep.
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 己亥，牛羊使董殷使于契丹。 [/INST] On the 19th, Dong Yin was sent as an envoy to the Khitan with cattle and sheep.</s>
Explain the meaning of this Classical Chinese passage in English: 己亥，牛羊使董殷使于契丹。
user
On the 19th, Dong Yin was sent as an envoy to the Khitan with cattle and sheep.
assistant