《资治通鉴·唐纪·唐纪一》
东都隋廷能管辖的地方只有城里，人心不定，朝议郎段世弘等人谋划响应李建成等率领的西军。
东都号令不出四门，人无固志，朝议郎段世弘等谋应西师。
The Sui Dynasty court in the eastern capital could only govern the city, the people's hearts were unsettled, and Duan Shihong and others of the imperial court planned to respond to the western army led by Li Jiancheng and others.