《宋史·列传·卷二百二十六》
皇帝北征时，他任勾当留司、皇城司。
车驾北征，勾当留司、皇城司。
When the emperor went on the northern expedition, he was in charge of the stay-behind office and the imperial palace office.
<s>[INST] 将以下英文转换为文言文: When the emperor went on the northern expedition, he was in charge of the stay-behind office and the imperial palace office. [/INST] 车驾北征，勾当留司、皇城司。</s>
将以下英文转换为文言文: When the emperor went on the northern expedition, he was in charge of the stay-behind office and the imperial palace office.
user
车驾北征，勾当留司、皇城司。
assistant