李德裕
In 843, Li Deyu had the matter of Xidamou's surrender reexamined and submitted an accusation against Niu and Li Zongmin. Emperor Wuzong posthumously honored Xidamou, but did not take further actions against Niu or Li Zongmin at that time. (This was commonly viewed as part of a plan for Li Deyu to take vengeance against Niu and Li Zongmin, abandoned only after Li Deyu found a more powerful way to attack them directly).