《宋史·本纪·卷三十七》
初九，派遣赵介出使金国告哀。
丁未，遣赵介使金告哀。
On the ninth day, Zhao Jie was sent to the Kingdom of Jin to deliver the sad news.
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 丁未，遣赵介使金告哀。 [/INST] On the ninth day, Zhao Jie was sent to the Kingdom of Jin to deliver the sad news.</s>
Explain the meaning of this Classical Chinese passage in English: 丁未，遣赵介使金告哀。
user
On the ninth day, Zhao Jie was sent to the Kingdom of Jin to deliver the sad news.
assistant