Li Zhengji
In 779, after Emperor Daizong's death and succession by his son Emperor Dezong, who had a reputation of being capable and wanting to suppress the power of the military governors, Li Zhengji, wanting to flatter the young emperor, offered to submit a large amount of cash as tribute. Emperor Dezong, listening to the advice of his chancellor Cui Youfu, sent imperial messengers to Pinglu to accept the tribute from Li Zhengji and immediately distribute the tribute to the Pinglu soldiers. Li Zhengji was said to be impressed by but became even more apprehensive of the new emperor as a result. After Emperor Dezong put down a rebellion led by Liu Wenxi () in 780 and showed Liu's severed head to Li Zhengji's messengers, Li Zhengji became even more fearful and planned for war against the imperial troops.