 As Gao had earlier declared Yuan Shanjian, the son of Yuan Baoju's cousin Yuan Dan () the Prince of Qinghe, emperor, Gao's territory became known as Eastern Wei, with Yuan Shanjian (Emperor Xiaojing) as emperor, and Yuwen's territory became known as Western Wei, with Emperor Wen as emperor.Yuwen Tai publicly deferred to Emperor Wen on most matters, but Yuwen held actual power, with Emperor Wen not being able to exercise much independent authority.Throughout the early years of his reign, there were serious doubts as to whether Western Wei would survive, as Eastern Wei was then the much stronger state, and Gao Huan made repeated attempts to conquer Western Wei.