Wang Chengzong
Also in 809, after the death of another warlord, Wang Shizhen the military governor of Chengde Circuit (成德, headquartered in modern Shijiazhuang, Hebei), Emperor Xianzong was initially poised to let Wang Shizhen's son Wang Chengzong inherit Chengde, after Wang Chengzong offered to surrender two of his six prefectures to imperial control. However, after Wang Chengzong reneged on his promise, Emperor Xianzong commissioned the eunuch Tutu Chengcui to command the imperial troops to attack Chengde. (As a result of this campaign's launch, when another warlord, Wu Shaocheng the military governor of Zhangyi Circuit (彰義, headquartered in modern Zhumadian, Henan) subsequently died, he was unable to act against Wu Shaocheng's subordinate Wu Shaoyang, who seized control of the circuit, and was forced to commission Wu Shaoyang, much to the lament of his imperial scholar advisors, who viewed Zhangyi as a far easier target than Chengde.) The campaign against Chengde stalled, however, with one of its original major proponents, Lu Congshi () the military governor of Zhaoyi Circuit (昭義, headquartered in modern Changzhi, Shanxi), secretly communicating with Chengde and interfering with the campaign. In summer 810, after Tutu arrested Lu at a feast and allowed the imperial general Meng Yuanyang () to take control of Zhaoyi, Wang agreed to formally submit to Emperor Xianzong, claiming that it was Lu who interfered in his relationship with the imperial government. Emperor Xianzong, seeing that the campaign was making no advances, ended it and made Wang the military governor of Chengde.