 At the time that Yuan Lang became the governor of Bohai Commandery, the imperial government was dominated by members of the paramount general Erzhu Rong, who, after Emperor Xiaozhuang had killed Erzhu Rong in 530, overthrew and killed Emperor Xiaozhuang, installing Yuan Ye and Emperor Jiemin successively.In summer 531, the general Gao Huan, believing the Erzhus to be corrupt and to have lost the support of the people, rose in rebellion at Xindu (信都, in modern Hengshui, Hebei), and while initially he claimed to be merely wanting to overthrow the Erzhus and still recognizing Emperor Jiemin, he soon, at the urging of his general Sun Teng (孫騰), came to believe that he needed to have an emperor under his control who could issue edicts as he wished.In winter 531, he therefore declared Yuan Lang, whose Bohai Commandery was under his control by that point, emperor, even though Yuan Lang's lineage was distant from that of recent emperors and was not even an imperial prince himself.