Xianbei Murong clan was originally a branch of Donghu, with a long history, during the Three Kingdoms period, the ancestor Mo Huba followed Emperor Xuan of Jin to destroy Gongsun Yuan of Liaodong, and the family gradually became stronger.

His son Murong Shegui vigorously developed Liaodong, especially Liucheng was prosperous under his governance, which made the later Longcheng prosperous.

After his death, his brother Murong Nai usurped power, and his son Murong Diao was forced to flee. A few years later, the subordinates killed Murong Nai and welcomed Murong Diao to succeed him.

Soon, Murong Diao was named the governor of Xianbei by the Western Jin Dynasty. The following year, Murong Diao migrated to the Great Thorn City, ending his life as a nomad.

After more than ten years, Xianbei's strength increased greatly, so Murong Diao called himself Xianbei Dadanyu. Later, the Central Plains regime of the Western Jin Dynasty collapsed, and Murong Diao was assisted by Han scholars, with Dajian City as the center, according to the Liaoshui Basin, and was subject to the Eastern Jin Dynasty officials.

After Murong Diao died of illness, his eldest son Murong Hao succeeded to the throne. His succession to the throne drew the resentment of his brothers. In order to appease the brothers, Murong Hao had no choice but to crown his most prestigious younger brother Murong Ren as the assassin of Pingzhou and the Duke of Liaodong, and let him occupy Liaodong alone.

But soon after, Murong Ren united with his third brother Murong Zhao, and finally rebelled in Liaodong. When the matter leaked, Murong Hao was furious and quelled the rebellion.

At first, Murong Hao had the upper hand, and soon captured Murong Zhao alive and gave him death. Because of the advice of Murong Ren's subordinates, he turned defeat into victory, and for a while, Murong Hao's followers took refuge in Murong Ren.

Duan Liao, the leader of the Xianbei tribe of the Duan Division, and other Xianbei tribes echoed Murong Ren's distance, and Murong Hao retreated to the western Liaoxi area, and since then the Murong tribe has been completely divided into two and attacked each other.

Later, Murong Hao made great efforts to govern and crusade against Murong Ren, stepping on the ice from the Bohai Coast, advancing more than 300 miles, Murong Ren hurriedly responded to the battle, and the generals defected in front of the battle, and was finally captured and executed by Murong Hao.

Murong Ren's Principality of Liaodong was destroyed, the Murong Department was reunited, and Murong Hao established himself as the King of Yan. A few years later, Murong Hao defeated Hou Zhao's army of 200,000, relieved the pressure from the Central Plains, and made Longcheng the capital from then on.

He did not stop, and broke Fuyu and Goguryeo in the east, and finally became the overlord of Liaoxi, and also laid the foundation for his son Murong Jun to enter the Central Plains.

In 319 AD, Murong Jun succeeded to the throne. After stabilizing the government, he attacked Hou Zhao, captured Youzhou, and moved the capital to Ji.

Two years later, the Later Zhao general Ran Min established himself as emperor with the state name Great Wei, intending to fight with Great Yan. Ran Min just garrisoned Yu Anxi, and Murong Ke, the general of the auxiliary state, immediately led his troops to arrive.

Ran Min was forced to turn to Changshan, and Murong Ke led his army to Liantai, and the two armies fought many times. How can Ran Min be extremely brave, and he will lose every battle against Dayan, and everyone is afraid.

Murong Ke found that Ran Min was brave and unscrupulous, and he commanded his soldiers to use the method of deception to defeat Ran Min, captured him, and the Great Yan army entered Changshan.

After Murong Ke won, King Yan sent the auxiliary general Murong Ping to lead an army of 10,000 to attack the Wei capital Yecheng, and the Wei general Jiang Wei sent a letter to Dayan, saying that he had surrendered, but sent people to the Eastern Jin Dynasty for help.

In June, the Eastern Jin Dynasty sent more than 100 people into Ye to help defend the city, and Jiang Hu led his army out of the city to meet the battle, but was defeated by Murong Ping.

In August, Wei Changshui's lieutenant Ma Yuan waited for the surrender. The Great Yan army conquered Yecheng, Jiang Wei and others abandoned the city and fled, and Wei was finally conquered by the Great Yan even though it was strong for a while.

After the death of Murong Jun, the eleven-year-old prince Murong Wei succeeded to the throne, and Murong Ke, the king of Taiyuan, assisted the government, and the government was stable for a while.

To Hanoi Taishou Lu Hu defected, Yan and the Eastern Jin Dynasty continued to fight in the Central Plains. Dayan was strong, so it naturally seized the initiative in the Central Plains and occupied Luoyang, but the Eastern Jin Dynasty still did not give up recovering the lost territory.

The Eastern Jin Dynasty sent the Great Sima Huan Wen Northern Expedition, at first Dayan was defeated, and planned to abandon the Central Plains and retreat north, but at this time, Murong Hao's fifth son Murong hung out of the horse, broke the constant temperature, and was known all over the world for a while, and all were in awe.

It's a pity that after Murong Ke's death, the greedy Shangyong King Murong commented on the auxiliary government. Murong Ping was at odds with Murong Trai, forcing Murong Trai to temporarily defect to Fu Jian.

And Fu Jian has long wanted to eliminate Dayan, but he has always been afraid of Murong Trai, and now that Murong Trai has surrendered, Fu Jian began to crusade.

At first, Dayan was not at a disadvantage, but the hateful Murong was judged to be greedy, which caused the army's morale to be weakened, and the main force of Dayan's 150,000 was annihilated by the former Qin army led by Wang Meng.

Fu Jian took advantage of the situation and led his army to besiege Yecheng, the capital of Qianyan. Murong Wei had no choice but to escape from Yecheng and tried to return to Longcheng, but was captured by the former Qin army on the way, and Dayan was destroyed.

Later, Murong Trai lost his way and returned, betrayed the former Qin, and restored Dayan. However, he died of illness soon after, and his son was defeated in the Northern Wei Dynasty Tuoba Jue in Shenhepo, and the country's strength plummeted.

Since then, Dayan has had many civil strife, and the throne has been changed repeatedly, and finally in the hands of Gao Yun, a hundred years of rivers and mountains have been completely ruined.