《资治通鉴·后周纪·后周纪三》
契丹主恼怒杨衮没有立功，囚禁了他。
契丹主怒其无功，囚之。
The Qidan Emperor was angry that Yang Gun had not won any battle, so he imprisoned him.
<s>[INST] Kindly elucidate the central themes in this passage in English: 契丹主怒其无功，囚之。 [/INST] The Qidan Emperor was angry that Yang Gun had not won any battle, so he imprisoned him.</s>
Kindly elucidate the central themes in this passage in English: 契丹主怒其无功，囚之。
user
The Qidan Emperor was angry that Yang Gun had not won any battle, so he imprisoned him.
assistant