宇文护
in fall 556, while Yuwen Tai was on a tour of the norther provinces, he became ill at Qiantun Mountain (牽屯山, in modern Guyuan, Ningxia). He summoned Yuwen Hu to Qiantun and entrusted the affairs of the state as well as his sons to Yuwen Hu. He soon died, and his heir apparent Yuwen Jue took over his titles, while Yuwen Hu took the reins of the state. (The senior generals and officials, who obeyed Yuwen Tai as effectively the first among equals, were initially reluctant to follow the leadership of the younger Yuwen Hu, only doing so after Yu Jin, previously Yuwen Hu's commanding general, declared his support on the basis that Yuwen Hu was the senior member of the Yuwen clan.) Around the new year 557, believing that Yuwen Jue, who was 14 at this time, needed to have his authority affirmed through an imperial title, Yuwen Hu had Emperor Gong of Western Wei (Emperor Wen's son) yield the throne to Yuwen Jue, ending Western Wei and establishing Northern Zhou.