《资治通鉴·陈纪·陈纪三》
到武成帝即位，奸佞小人当权，朝政逐渐混乱，北齐人凿冰防备北周军队入侵。
及世祖即位，嬖幸用事，朝政渐紊，齐人椎冰以备周兵之逼。
After Wucheng Emperor took the throne, treacherous and deceitful people came to power and the court politics gradually grew chaotic. The Northern Qi people cut ice to defend against the Northern Zhou forces.