 During this turmoil, the Murong clan of the Xianbei from the Liaodong region launched a southern invasion.The Murong clan had founded the Kingdom of Yan (Former Yan) in 337 but remained a vassal of the Eastern Jin Dynasty.In 350, Murong Jun, the Prince of Yan, at the suggestion of his half brother Murong Chui, attacked the Later Zhao and Ran Wei in the name of restoring northern China to Jin rule.