Book of Northern Qi: On the 5th month, day wuwu, he received the abdication of Emperor Xiaojing and ascended the throne at the southern suburb of Ye…
On the 5th month, day wuwu, he received the abdication of Emperor Xiaojing and ascended the throne at the southern suburb of Ye, founding Northern Qi and changing the 8th year of Wuding to the 1st year of Tianbao.
戊午，乃即皇帝位於南郊
Location: 北齊書 卷4
Emperor Xiaojing of Eastern Wei yielded the throne to Gao Yang, Prince of Qi (founding of Northern Qi, first year of Tianbao).
丙辰，遜帝位於齊
Location: 北史 卷5 東魏武定8年
Gao Yang (Emperor Wenxuan) ascended at the southern suburban altar, founding Northern Qi and changing the era. (The source continues with a presentation at Ye, 鄴下 適作, left as given.)
皇帝即位於南郊，升壇，柴燎告天
Location: 北史 卷7 天保元年
Emperor Xiaojing abdicated to Qi and withdrew to a separate palace (the end of Eastern Wei).
丙辰，詔歸帝位於齊國，即日遜於別宮。
Location: 魏書卷12·武定八年
Eastern Wei's Emperor Xiaojing (Yuan Shanjian) yields the throne; Gao Yang founds Northern Qi (May).
遣太尉彭城王韶等奉璽綬，禪位於齊
Location: 卷163
Place: 鄴
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