In 479, after rival Liu Song's throne was usurped by the general Xiao Daocheng, who established Southern Qi as its Emperor Gao, Northern Wei commissioned Liu Chang (劉昶) the Prince of Danyang, a Liu Song prince who had fled to Northern Wei in 465, with an army and promising him support to rebuild Liu Song. However, Liu Chang's abilities were not up to task, and he was never able to gain much following in the border regions to mount a major drive to reestablish Liu Song. By 481, the campaign had fizzled.