Wang Chengzong (王承宗) (died 820) was a general of the Chinese Tang Dynasty who served a military governor (Jiedushi) of Chengde Circuit (成德, headquartered in modern Shijiazhuang, Hebei). He, like his grandfather Wang Wujun and father Wang Shizhen before him, ruled the circuit in a de facto independent manner from the imperial government, drawing two imperial campaigns against him, both of which he withstood. After the defeat of his ally Wu Yuanji in 817, he submitted to imperial authority, and, after his death, his brother Wang Chengyuan left the circuit, ending his family's hold on Chengde.
Read more about Wang Chengzong: Background, First Campaign of Resistance Against The Imperial Government, Between The Two Campaigns, Second Campaign of Resistance Against The Imperial Government, Submission To Imperial Authority