Pingcheng (465) — the same event in Book of Wei and Zizhi Tongjian

Book of Wei: Emperor Wencheng died in the Taihua Hall at the age of 26.; Zizhi Tongjian: Emperor Gaozong of Northern Wei dies; Crown Prince Hong…

What each source says

Book of Wei (Weishu), Imperial Annals · AD 465 · 平城

Emperor Wencheng died in the Taihua Hall at the age of 26.

五月癸卯，帝崩于太華殿，時年二十六。
Location: 魏書卷5·和平六年

Zizhi Tongjian (Comprehensive Mirror) · AD 465 · 平城

Emperor Gaozong of Northern Wei dies; Crown Prince Hong ascends as Emperor Xianwen (May).

甲辰，太子弘即皇帝位
Location: 卷130

Place: 平城

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