sentences:  The coup leaders also killed many of Emperor Yang's relatives and high-level officials.However, as Yang Hao was friendly with Yuwen Huaji's brother Yuwen Zhiji (), Yuwen Zhiji persuaded Yuwen Huaji to spare Yang Hao, and subsequently, Yang Hao was declared emperor by an edict issued in the name of Emperor Yang's wife Empress Xiao, although Yuwen Huaji wielded actual powers, as regent.There was no evidence that suggested that Yuwen Huaji permitted Yang Hao to actually exercise any imperial powers.