Li Changchun
In spring 782, Ma, Li Baozhen, and Li Sheng, joined by Li Qiu (), the military governor of Heyang Circuit (converted from Heyang Base), engaged Tian, who was aided by soldiers from Chengde and Pinglu Circuits, near Wei Prefecture, and they had a major victory over Tian. Tian was again forced to flee back to Wei Prefecture. The officer that Tian had put in charge of Wei Prefecture, Li Changchun (), was ready to turn against Tian and submit to the imperial government, and when Tian arrived during the night, he closed the city gates. However, Ma and Li Baozhen, who had grudges against each other over Ma's defense of Li Baozhen's subordinate Yang Shu (), whom Li Baozhen had wanted to kill, could not chase after Tian quickly, and by morning, Li Changchun was forced to open the city gates, allowing Tian to reenter, execute Li Changchun, and get ready to defend the city. Only after more than a day did Ma and Li Baozhen arrive at Wei Prefecture, and they could not immediately capture it.