杜佑
When Emperor Dezong died in 805 and was succeeded by his son Emperor Shunzong, Du You served as regent for several days before Emperor Shunzong officially took over the reins of the state. Soon thereafter, Du was again put in charge of the financial matters of the state, with Emperor Shunzong's close associate Wang Shuwen as his deputy — as Wang, who was powerful at the time, believed that it would be more appropriate to serve as deputy to the senior Du. Several months later, however, when Wang Shuwen's mother died and he had to leave official service to observe a mourning period for her, Wang's partisans lost power. Wang's ally Wang Pi made repeated requests to Du for him to intercede to recall Wang Shuwen from his mourning period, but Du was either unwilling or unable to. Soon thereafter, Emperor Shunzong, who was seriously ill, yielded the throne to his son Emperor Xianzong, and Wang Shuwen and his associates were almost immediately purged.