 Emperor Wen therefore became the only claimant to the Northern Wei throne.Yuwen, declaring Northern Qi a rebel state, launched a major attack, but Gao Yang himself commanded a large army to defend against the attack, and Western Wei not only did not make gains, but lost a number of provinces to Northern Qi.In 551, Emperor Wen died and was buried with honors due an emperor, with Empress Yujiulü, although eventually Empress Yifu was buried with him.