Emperor Ming began his reign by killing all the descendants of Emperor Xiaowu, and his suspicious nature resulted in the loss of the provinces north of the Huai River, which were only briefly regained in the other Southern dynasties. Emperor Ming's young son became Emperor Houfei. The political situation was volatile. General Xiao Daocheng slowly gained power and eventually deposed Emperor Houfei in favor of his brother, who became Emperor Shun. After defeating the rival general Shen Youzhi, Xiao forced Emperor Shun to yield to throne and crowned himself Emperor Gao of Southern Qi, thus ending the Liu Song dynasty.