郑昌 / Zheng Chang (Han King)
郑昌 / Zheng Chang enters the wiki through Hanji 149 part 2 as the man 项羽 appoints after killing 韩成. The episode identifies him as a former county official around Wu County, the early base area of 项梁 and Xiang Yu, and reads him as an old Xiang-line loyalist.
Zheng Chang’s kingship is politically weak in the source. It replaces a restored Han royal figure with a trusted Xiang associate, but it does not hold the old Han territory after 刘邦 begins advancing. Once Zheng Chang surrenders, Liu Bang installs 韩王信 as Han king instead.
The page is source-scoped around this narrow role: Zheng Chang shows Xiang Yu using personal trust to patch a title problem, while Liu Bang uses surrender and old Han legitimacy to reverse that patch.