During Murong Ke's Regency
Muyu Gen, a more senior official than Murong Ke or Murong Ping, was unwilling to submit to Murong Ke, and he falsely told the young emperor and his mother Empress Dowager Kezuhun Murong Ke and Murong Ping were planning a rebellion. Empress Dowager Kezuhun believed Muyu, but the young emperor did not and refused to authorize his actions. Murong Ke soon found out and, after consulting with Murong Ping, executed Muyu and his clan.
Murong Ke was clearly the regent at this point, but he consulted Murong Ping on all major decisions. His regency was considered a successful one, as he governed the empire with efficiency while expanding its borders southward, at Jin's expense. Murong Ping's role in this success is unclear. In 361, the magician Ding Jin (丁進), whom Murong Wei trusted, tried to flatter Murong Ke by suggesting to him to kill Murong Ping, but Murong Ke became angry and executed Ding.
In 366, both Murong Ke and Murong Ping offered to resign their posts and return all of their authorities to Murong Wei. Murong Wei declined.
In 367, Murong Ke grew ill. He tried to persuade Murong Ping, Murong Wei, and Murong Wei's older brother Murong Zang (慕容臧) the Prince of Le'an that one of his main responsibilities, as the commander of the armies, should be transferred to Murong Chui the Prince of Wu, his brother, as he saw Murong Chui as a capable general, but after Murong Ke died later that year, Murong Ping declined to do so, and instead gave that post to Murong Wei's younger brother Murong Chong the Prince of Zhongshan. Murong Ping himself assumed the regency and held power in conjunction with Empress Dowager Kezuhun.
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