《资治通鉴·后汉纪·后汉纪一》
春季，正月，丁亥朔，后晋的文武百官在大梁城北远远地向后晋出帝辞别，然后改换白衣纱帽，迎接契丹主耶律德光，全都在路旁伏服请罪。
春，正月，丁亥朔，百官遥辞晋主于城北，乃易素服纱帽，迎契丹主，伏路侧请罪。
In the spring, in January, Ding Hai’s first day, the Later Jin Dynasty’s civil and military officials, far from the north of the Liang Capital, bid farewell to the Later Jin Dynasty’s last emperor, and then changed into white clothes and gauze hats, welcoming the Khitan master Yelü Deguang. They all begged for forgiveness along the road.