Huang Chao
At the time that Shang Rang joined Huang Chao, Huang Chao was sieging Bo Prefecture (亳州, in modern Bozhou, Anhui). Shang supported Huang as the leader of the movement, and Huang subsequently claimed the title of "Chongtian Dajiangjun" (衝天大將軍, "Generalissimo Who Charges to the Heavens") and changed the era name to "Wangba", to show independence from the Tang regime.