Li Su
Soon thereafter, with Emperor Xianzong considering a campaign on the western border against Tufan, in summer 818, he made Li Su the military governor of Fengxiang (鳳翔, headquartered in modern Baoji, Shaanxi) and Longyou (隴右, then also headquartered in modern Baoji) Circuits. Before Li Su could head to Fengxiang, however, Wu Yuanji's ally Li Shidao the military governor of Pinglu Circuit (平盧, headquartered in modern Tai'an, Shandong), who had, in fear after Wu's defeat, initially offered to surrender three of Pinglu's 12 prectures to imperial control, reneged on his offer. Emperor Xianzong, in anger, announced a campaign against Pinglu. Li Su was thereafter swapped in his posting with his brother Li Yuan () the military governor of Wuning Circuit (武寧, headquartered in modern Xuzhou, Jiangsu), which bordered Pinglu to the south, as well as the prefect of Wuning's capital Xu Prefecture (). Once Li Su got to Xu Prefecture, he reorganized the troops into greater efficiency. At Li Su's request, Emperor Xianzong pardoned Dong and recalled him, and Li Su subsequently made Dong a commander in his army. Li Su subsequently engaged in 11 battles with Pinglu forces, prevailing each time. Around the new year 819, he captured the key Pinglu city of Jinxiang (金鄉, in modern Jining, Shandong), and thereafter continued to capture Pinglu cities. Li Shidao was thereafter killed by his own subordinate Liu Wu, who submitted to imperial authority.