另一方面，澶渊之盟的订立使北宋河北边防建设处于两难境地，不得不倍极小心。
The other hand, Hebei frontier defence construction caught in a dilemma after the sign of Chanyuan alliance, this forced Northern Song Dynasity very carefully.
另一方面，澶渊之盟的订立使北宋河北边防建设处于两难境地，不得不倍极小心。
The other hand, Hebei frontier defence construction caught in a dilemma after the sign of Chanyuan alliance, this forced Northern Song Dynasity very carefully.
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