Liu Yu, the word Bo'an. A native of Tancheng in the East China Sea (now Tancheng, Shandong). After Liu Qiang, the son of Emperor Guangwu of the Han Dynasty, Liu Xiu, the son of Emperor Guangwu of the Han Dynasty, Liu Yu's grandfather Liu Jia served as Guangluxun, and his father Liu Shu served as the Taishou of Danyang.

Although Liu Yu was the royal prince of the Han family, but at that time, the world was in decline and he was estranged from the monarch, so at first he himself was only a Cao official, but Liu Yu was able to do his job well, so he was promoted to become a county official, and was finally promoted to filial piety and became Langzhong, and later moved to Youzhou because of his accumulated political achievements.

According to the "Heroes' Record", Liu Yu used to manage the place in a fair and peaceful manner during his tenure as Boping Ling, so that the people in the territory were noble and simple, and not only were there no thieves in the territory, but there were even no disasters. At that time, locusts in neighboring counties were infested, and when they reached the Boping boundary, they couldn't fly through.

During his tenure as the assassin of Youzhou, Liu Yu was quiet and frugal, educating the people with etiquette and righteousness. The people and barbarians were moved by his benevolence, and the Xianbei, Wuhuan, Fuyu, and Zhan tribes all paid tribute on time and did not dare to harass the border, so he was praised by the people.

In the ninth year of Yanxi (166), there was a fire in Nangong, under the persuasion of Zhang Rang, Zhao Zhong and others, Emperor Ling asked for ten yuan of land tax per mu to repair the palace, and later even as long as the officials of the state and county were promoted to fill the vacancies, they all asked for funding the money to repair the palace, some 10 million, some 20 million, the rich began to use their private wealth, and some people looted the people's money for backup, and the poor and honest people could not be filled, and some even committed suicide. And Emperor Ling didn't let him pay because Liu Yu was poor.

Later, Liu Yu was dismissed from the post of Youzhou Assassin because of official business and became Ganling Xiang, during which Liu Yu went home due to illness.

After Liu Yu returned to his hometown, he did not show his face because he was in a high position, but often surrendered his identity, celebrated festivals with the local people, helped others together, and was with everyone in everything, never showing his special identity, so the township respected him very much.

At that time, there was a complaint in the township, and they didn't even go to see the official, but went to Liu Yu for judgment. Liu Yu analyzed and judged them with reason and emotion, and everyone recognized it very much, and everyone obeyed Liu Yu, big and small, and no one felt regret and injustice for this.

At that time, a family's cattle were lost, because their bones and coat were similar to Liu Yu's cows, so he went to ask Liu Yu for it, and Liu Yu gave him his cattle. Later, his own cattle were recovered, and the owner of the cattle came to apologize to Liu Yu in person.

Later, there was another turmoil in Ganling, and the local officials and people missed Liu Yu very much, so Liu Yu was reappointed as the minister of Ganling, and the situation in Ganling immediately improved greatly.

Liu Yu was later able to worship Shang Shuling and Guangluxun because of his merits, and he was also an imperial relative, with extraordinary etiquette, Liu Yu eventually became Zongzheng, responsible for managing the emperor's relatives in the world.

In the Zhongping period (184-189), the cavalry general Zhang Wen led an army to crusade against the Liangzhou thief Kou Hansui and others, and requisitioned 3,000 Wuhuan cavalry from Youzhou, but due to the lack of military food supply, the Wuhuan cavalry fled back to their country. At the beginning, Zhang Chun, the former prime minister of Zhongshan, recommended himself as a general, but was rejected by Zhang Wen, and Zhang Wen instead took Gongsun Chan as a general, so Zhang Chun hated him deeply.

Zhang Chun saw that the Wuhuan cavalry had fled, so he said privately to Zhang Ju, the former Taishan Taishou who was also not reused by Zhang Wen, and said: "Now Wuhuan has betrayed and wants to make trouble. The thieves in Liangzhou rose up, and the imperial court could not prohibit it. There is also a child born to the wife of a Luoyang man with two heads, which is a sign that the Han Dynasty has exhausted its vitality and there are two lords in the world. If you join me in leading the Wuhuan people to raise troops, you may be able to accomplish great things. ”

Zhang Ju was not angry because he was not reused by Zhang Wen, so he followed Zhang Chun's advice. So the two united with Qiu Liju, the leader of Wuhuan, and the two sides formed an alliance to betray the imperial court, and Zhang Ju was armed with 9,000 people.

So they began to attack Jidi, burned the city, plundered the people, and killed the Wuhuan captain Ji Chou, the right Beiping Taishou Liu Zheng, Liaodong Taishou Yangzhong and others, the troops reached more than 100,000 people, stationed in Feiru. Zhang Ju was called "the Son of Heaven", and Zhang Chun was called "General Mitian and King Anding", and sent documents to the prefectures and counties, saying that Zhang Ju wanted to replace the Han Dynasty, let the Son of Heaven abdicate, and ordered the secretary to come to greet him. Zhang Chun sent 50,000 cavalry from King Wuhuan and others to enter the two prefectures of Qingdao and Hebei, break through the Qinghe River and the plains, and kill officials and people.

The imperial court sent Zhonglang general Meng Yi to lead the cavalry commander Gongsun Chan to crusade against Zhang Chun and others, and the two sides fought for a long time, winning and losing each other, but Gongsun Chan and others were ultimately unable to prevent the rebels and barbarians from invading the four prefectures of Qing, Hebei, You, and Xu.

Because Liu Yu had always had prestige and kindness to the north, Emperor Ling appointed Liu Yu as the pastor of Youzhou in the fourth year of Zhongping (188), controlling local power and suppressing rebellions.

After Liu Yu arrived in Jicheng, not only did he not expand his military strength, but instead streamlined his troops. At the very beginning of his tenure, he sent envoys to Qiu Liju and the king of Wuhuan Qiao, telling them that the court would be lenient and could exempt them from responsibility for the crimes they had committed, and that they should be ordered to hand over Zhang Chun's head. Qiu Liju and the others were very happy when they heard that Liu Yu had returned, and they sent envoys to meet Liu Yu and withdrew the troops to their respective territories. After Hu Ren learned of this news, he still did not change his mind, but sent someone to change the route to see Liu Yu.

After meeting with the Hu envoys, Liu Yu withdrew all the men and horses, leaving only Gongsun Zan to lead the infantry and ride nearly 10,000 people, stationed in Youbeiping. At the same time, Liu Yu ordered a reward in the name of Youzhou Mu to reward Zhang Ju and Zhang Chun. The two fled to the outside of the Seychelles, and the rest surrendered or fled. At that time, Zhang Chun left his wife and children, fled to Xianbei alone, was killed by his disciple Wang Zheng, and dedicated his head to Liu Yu, Wang Zheng was named a liehou, and Zhang Ju was nowhere to be found.

In this way, under the prestige of Liu Yu, without moving a single soldier, Qiu Liju and Wuhuan Qiaowang and other foreign clans all surrendered, Zhang Ju disappeared, Zhang Chun was killed by his subordinates, and the rebellion in the north was quelled. Therefore, Emperor Ling of the Han Dynasty sent an envoy to promote Liu Yu to the rank of lieutenant and seal the Marquis of Rongqiu (one said to be the Marquis of Xiangben).

Later, Dong Zhuo took control of the government, and promoted Liu Yu to the Great Sima, Gongsun Zhan to the general of Fenwu, and was named the Marquis of Ji.

When the Kwantung princes jointly crusaded against Dong Zhuo, because Youzhou was located in a remote area, so they could not participate, Dong Zhuo later abducted Emperor Xian to Chang'an, and then appointed Liu Yu to replace Yuan as the prince, but because of the long distance and blocked roads, the order was not successfully delivered to Liu Yu.

In the early period of the history of the Three Kingdoms, the great Sima Liu Yu was a very rare figure in that era whose prestige and prestige were still from the old Yuan family of the Fourth and Third Dukes, and the leader of the Kwantung Alliance, Yuan Shao, and even Yuan Shao himself was very convinced of him and was willing to assist him.

It's a pity that Liu Yu is not Emperor Guangwu Liu Xiu.