It is admittedly confusing because Emperor Xiaowen on Tuoba Wei and Cao Rui had the same era names, but judging from the commentary this is supposed to be Cao Rui of Northern (Cao) Wei and not Tuoba Wei, which the tag Northern Wei refers so. Retagging appropriately.

Jemnite said:

It is admittedly confusing because Emperor Xiaowen on Tuoba Wei and Cao Rui had the same era names, but judging from the commentary this is supposed to be Cao Rui of Northern (Cao) Wei and not Tuoba Wei, which the tag Northern Wei refers so. Retagging appropriately.

The commentary is actually quoting the (Tuoba) Wei Shu, and is describing events from Tuoba Hong's reign up to his death at the Gutangyuan imperial abode, so retagging as Northern Wei.