Empress Dowager Feng was soon presented with a major opportunity to expand Northern Wei territory, as also in 466, rival Liu Song had a major dynastic succession struggle after Emperor Qianfei of Liu Song was assassinated in 465. Emperor Qianfei's uncle Emperor Ming of Liu Song was declared emperor in the capital Jiankang, while his brother Liu Zixun the Prince of Jin'an was declared emperor in early 466 in Xunyang (尋陽, in modern Jiujiang, Jiangxi). After Emperor Ming's forces defeated Liu Zixun's and captured and executed Liu Zixun in fall 466, the Liu Song general Xue Andu (薛安都), the governor of Xu Province (徐州, modern northern Jiangsu and northern Anhui), who had initially declared for Liu Zixun, was apprehensive that he would be punished by Emperor Ming, and so decided to surrender to Northern Wei, and soon, he was joined by Bi Zhongjing (畢眾敬) the governor of Yan Province (兗州, modern western Shandong) and Chang Zhenqi (常珍奇) the governor of Ru'nan Commandery (汝南, roughly modern Zhumadian, Henan). Empress Dowager Feng sent the general Yuchi Yuan (尉遲元) to accept the surrenders of these Liu Song generals and to secure the region just north of the Huai River, and Yuchi subsequently defeated two attempts by Emperor Ming to recapture those provinces. She also sent the general Murong Baiyao (慕容白曜) to attack and try to capture Liu Song's Qing (青州, modern central and eastern Shandong) and Ji (冀州, modern northwestern Shandong) Provinces, which were cut off from the rest of Liu Song after Xue's defection, and by 469, both provinces fell into Northern Wei hands, and all of the regions north of the Huai River was by now Northern Wei territory.