慕容評
In 367, after Murong Ke's death and replacement by the far less capable Murong Ping, Fu Jian began plans to conquer Former Yan. He would soon, however, have to contend with the possibility that his empire would be the one so conquered, as in winter of that year, Fu Liu (at Puban (蒲阪, in modern Yuncheng, Shanxi)), Fu Sou (at Shancheng (), in modern Sanmenxia, Henan)), Fu Wu (at Anding (安定, in modern Pingliang, Gansu)), and Fu Jian's brother Fu Shuang () the Duke of Zhao (at Shanggui (上邽, in modern Tianshui, Gansu)), rebelled together, offering to submit to Former Yan and seeking Former Yan aid. However, Murong Ping refused assistance. Fu Jian sent forces to attack the four rebellious dukes separately. Fu Wu and Fu Shuang were quickly defeated and killed, followed by Fu Liu and Fu Sou.