Wang Chengzong
In 812, after another warlord, Tian Ji'an the military governor of Weibo Circuit (魏博, headquartered in modern Handan, Hebei), his relative Tian Xing seized control of Weibo from Tian Ji'an's son Tian Huaijian and submitted the circuit to imperial orders. When Li Shigu's brother and successor Li Shidao threatened to attack Tian Xing along with Wang Chengzong the military governor of Chengde Circuit (成德, headquartered in modern Shijiazhuang, Hebei) and threatened Han with this, Han threatened to attack Pinglu's Cao Prefecture (曹州, in modern Heze, Shandong) if Li Shidao attacked Weibo. Li Shidao became apprehensive and did not act against Weibo.