Yuwen Shu
In 604, while Emperor Wen was ill, Yuwen Shu was one of the guard commanders that Yang Guang summoned to guard Emperor Wen's vacation palace Renshou Palace (仁壽宮, in modern Baoji, Shaanxi). Emperor Wen soon died—a death that traditional historians, while admitting a lack of direct evidence, generally believed to be a murder ordered by Yang Guang. Yang Guang then took the throne as Emperor Yang, and he put Yang Yong to death.