《资治通鉴·后晋纪·后晋纪三》
我观察契丹数年以来，士马精强，吞并四邻，战必胜，攻必取，割据中原的土地，收缴中原的器械；他的君主智勇过人，他的臣僚上下洽睦，牛羊繁殖茂盛，国家没有天灾，是不可以把他视为敌人的。
臣窃观契丹数年以来，士马精强，吞噬四邻，战必胜，攻必取，割中国之土地，收中国之器械；其君智勇过人，其臣上下辑睦，牛马蕃息，国无天灾，此未可与为敌也。
I have observed Khitan for the past several years, their army is powerful and well-trained, they have annexed neighboring nations, they always win in combats and conquer everywhere they attack; they have occupied the territories of中原， confisticated weapons from中原; their king is wise and brave, their ministers all work together in harmony, their livestock is prolific, their country is free of natural disasters, they absolutely cannot be considered as our enemy.