In 229 BC, in light of Wang Jian's invasion of Zhao, where Li Mu had already achieved an stalemate against the Qin Generals Wang Jian, Yang Duan He and Qiang Lei; the Qin decided to sent spies to the Zhao court, bribing key courtiers such as Guo Kai (郭開) and Han Cang (韓倉) in order to convince them to persuade the King of Zhao to replace Li Mu and Sima Shang (司馬尚) with Zhao Cong (趙蔥) and Yan Ju (顏聚) as generals by alleging that the former were planning a rebellion.
This event occurred in 229 BC, following Wang Jian's invasion of Zhao, where Li Mu had already achieved a standoff against the Qin Generals Wang Jian, Yang Duan He, and Qiang Lei; the Qin then employed covert agents to infiltrate the Zhao court, bribing key administrators such as Guo Kai (郭開) and Han Cang (韓倉) in order to persuade them to convince the King of Zhao to replace Li Mu and Sima Shang (司馬尚) with Zhao Cong (趙蔥) and Yan Ju (顏聚) as generals by alleging that the former were planning a coup.