《资治通鉴·梁纪·梁纪二十一》
壬午，北齐国主高洋到北方巡视冀州、定州、幽州、安州，于是决定讨伐契丹。
壬午，齐主北巡冀、定、幽、安，遂伐契丹。
On Renwu, the Lord of the Northern Qi Dynasty, Gao Yang, inspected Jizhou, Dingzhou, Youzhou, and Anzhou in the north, and decided to attack the Khitan.