Yuan Zhen
After Murong Ke died in 367, Huan began to plan to attack Former Yan, whose regime was now largely in the hands of Murong Wei's granduncle Murong Ping the Prince of Shangyong, regarded as incompetent and corrupt, and Murong Wei's mother Empress Dowager Kezuhun. In 369, he launched the campaign, in conjunction with Chi Chao's father Chi Yin (郗愔), his brother Huan Chong, and Yuan Zhen, although he soon seized Chi Yin's troops and put them under his own command. Despite Chi Chao's advice that he head directly for Former Yan's capital Yecheng, Huan proceeded slowly, defeating Former Yan's troops repeatedly but taking three months to reach the Yellow River, stoppinging Fangtou (枋頭, in modern Hebi, Henan) -- and again hesitated there at crossing the Yellow River and attacking Yecheng, not far away.