《资治通鉴·后周纪·后周纪四》
世宗又将清淮军改为忠正军来表彰刘仁赡的节操，任命右羽林统军杨信为忠正节度使、同平章事。
帝复以清淮军为忠正军，以旌仁赡之节，以右羽林统军杨信为忠正节度使、同平章事。
The emperor renamed Qinghuai army to Zhongzheng in order to honor Liu Renshan’s integrity. He appointed right Yulin commander Yang Xin as Zhongzheng 節度使 and same level as Pingzhangshi.