After Murong Bao ascended the throne, emperor Murong Bao of Later Yan was attacked by Northern Wei forces, and the capital of Yi and Zhongshan fell one after another, so Murong Bao led more than 10,000 troops and princes and nobles to flee north to the land of Gain and defect to his son Murong Hui.
Although Murong Hui welcomed Murong Bao into the city on the outskirts, he was dissatisfied with his father's failure to make himself crown prince.
In order to prevent civil unrest, Murong Bao divided his forces into two brothers Murong Nong and Murong Long. Murong Hui was furious and sent more than twenty Assassins to kill his uncle Murong Long by night, and then went to assassinate Murong Nong, but without success.
The father and son then fought fiercely at Longcheng, and their son Murong Hui was defeated and fled south to the newly restored Zhongshan, where he was killed by Murong Xiang.
Although Murong Bao won his son, his power was greatly reduced because of this civil unrest, which led to the mutiny launched by Duan Subone in Longcheng. In desperation, Murong Bao, his son Murong Sheng, and the general Mu Youteng rushed south to Jicheng, and then to Wulu, Neihuang, jizhou and other places in the Central Plains.
While in exile, Murong Bao received a letter from his uncle Lan Khan (Murong Chui's uncle) asking him to return to Longcheng.
Murong Bao believed that since Lan Khan had asked him to return, it would be better to return to Longcheng, so he returned to the northeast from the Central Plains. But what he never expected was that as soon as he entered the city, he was killed by Lan Khan.
At this time, Murong Sheng, who was in charge of the palace, was still in Jicheng, and when he heard that his father-in-law Lan Khan had killed his father, he was furious and immediately decided to go to Longcheng to avenge his father.
Murong Sheng's subordinate Zhang Zhen resolutely dissuaded him, believing that once he entered Longcheng, he would inevitably be more fierce and less auspicious.
Murong Sheng analyzed Zhang Zhen and said, "I will now go and cast a net and tell him that I have run out of mountains and rivers and have nothing. Lan Khan is a person who pays attention to family affection, and he will definitely take care of my marriage relationship with his daughter and will not bear to kill me. In this way, in ten and a half days, I can use my will. ”
When the news of Murong Sheng's mourning for his father in Longcheng reached Lan Khan's home, Lan Khan's wife Yi Shi, fearing that her husband would kill her son-in-law, cried and begged her husband not to kill her son-in-law.
Lan Khan also felt pity for Murong Sheng because of his daughter's relationship, so he asked his son Lan Mu to personally go outside the city to greet him, and arranged for him to stay in the palace.
Lan Khan's brother Lan Ti and younger brother Lan Nan both advised him to kill Murong Sheng to avoid suffering, but Lan Khan did not accept it.
Murong Sheng, convinced that his father-in-law Lan Khan had no intention of killing himself, conspired with his son Murong Qi to raise troops outside to threaten Longcheng and force internal chaos.
Sure enough, When Lan Khan heard that his grandson Murong Qi had raised an army to resist, he asked his brother Lan Ti to lead an army to suppress it.
Lan Ti had always been arrogant and arrogant, and was often not bound by Lan Khan, so Murong Sheng took advantage of this estrangement between their brothers and took the opportunity to carry out divisive measures.
He said to Lan Khan, "Murong Qi is a child, how can he plot the courage to rebel, he can't do great things, this must be someone doing his internal response." Uncle Ranti was very arrogant, and he should not be allowed to lead the army at this time. ”
Lan Khan actually listened to Murong Sheng's words, killed Lan Ti in a fit of rage, and instead ordered Qiu Nimu to suppress Murong Qi.
However, the killing of his brother Lan Ti by Lan Khan immediately aroused the opposition of the other brothers, who rebelled and defeated The army of Qiu Nimu. Lan Khan was very frightened and hurriedly sent his son Lan Mu to lead his troops to the crusade.
Lan Mu advised Lan Khan, "Murong Sheng is an enemy of our family, and Murong Qi is now raising troops outside, and Murong Sheng will definitely respond to the inside." Coupled with the calamity of killing each other among our brothers, we should not ignore Murong Sheng and nurture the troubles of our confidants. ”
Lan Khan listened to his son's words, felt that it made sense, and prepared to make up his mind to kill Murong Sheng. Unexpectedly, this news was heard by Murong Sheng's wife. Lan Shi rushed home and told her husband that Murong Sheng was frightened into a cold sweat by what his wife said, and immediately pretended to be ill and never showed his face again.
Lan Khan thought that his son-in-law was really seriously ill, so he did not kill him.
Soon, Lan Mu's rebellion against his uncle Lan Nan was successful, and the generals, Lan Khan and Lan Mu were all drunk.
Murong Sheng took the opportunity to go to the toilet at night, climbed over the wall, jumped into the Eastern Palace, and together with his old friend Li Qian, beheaded Lan Mu, and then led the Eastern Palace generals to attack Lan Khan and capture and kill him. Subsequently, he killed his two sons, Lan He and Lan Yang.
In this way, Murong Sheng, with the help of his wife, killed his father-in-law, and finally avenged his father, re-established Murong's regime, and became the fifth emperor of Later Yan.