Cao Huan (246-302), whose real name is Cao Huang, whose name is Jingming, was a native of Peiguo Qiao County (now Bozhou, Anhui), the grandson of Cao Cao, Emperor Wu of Wei, the son of Cao Yu, King of Yan, the last emperor of Wei during the Three Kingdoms period, and reigned from 260 to 265.

In the third year of manna (258 years), he was named the township of Changdao. In the fifth year of Ganlu (260 years), Emperor Wei noble township Cao Chao was killed by Chengji, Sima Zhao discussed with the ministers, established Cao Huan as the emperor, and worshiped Emperor Cao Rong of Wei Ming. Although Cao Huan is called the emperor, he is actually a puppet of the Sima family.

In the second year of Xianxi (265), after the death of Sima Zhao, his son Sima Yan became the king of Jin and usurped the power of Wei, and the Wei state was destroyed, and Cao Huan was demoted to the king of Chenliu. In the first year of Tai'an (302), Cao Huan died at the age of fifty-eight, and was nicknamed Emperor Yuan.

Cao Huan, whose real name is Cao Huang, is Jingming, born in the seventh year of Zhengshi (246), is the grandson of Cao Cao, Emperor Wu of Wei, the nephew of Cao Pi, Emperor Wen of Wei, and the son of Cao Yu, King of Yan. In the third year of Ganlu (258 years), he was named Changdao Township Gong [2] (because Changdao is under the jurisdiction of Anci County, it is also called Changdao Township Gong of Anci County).

In May of the fifth year of Ganlu (260), Emperor Cao Chao of Wei was killed, and Sima Zhao decided to make Cao Huang emperor after consulting with the ministers. [4] On the 8th day of the fifth month, Sima Zhao sent his son, Sima Yan, the middle protector, to Yecheng to meet Cao Huang.

On the first day of the sixth month of the fifth year of Ganlu (260), the Empress Dowager Guo Shi (Empress Guo of the Ming Yuan) issued an edict to let Cao Huang change his name to Cao Huan. [6] On the second day of the first month of June, Cao Huan came to the capital Luoyang (now Luoyang, Henan), and after meeting the Empress Dowager Guo, he took the emperor's throne in the front hall of Taiji on the same day, granted amnesty to the world, changed the year name to Jingyuan, and rewarded the ministers according to their titles.

On the fourth day of the sixth month of the first year of Jingyuan (260), Cao Huan worshiped the general Sima Zhao as the prime minister, and was named the Duke of Jin, and the food was increased by two counties, a total of ten counties, and the gift of nine tins was added. In addition, for the children of the Sima family, those who do not yet have the title are all named pavilion marquis, and they are given tens of millions of dollars and 10,000 horses. Sima Zhao tried his best to refuse.

Although Cao Huan was nominally the emperor, he actually had no power in his hands, nor did he have any power in the ministers and the army, and was completely a puppet of the Sima clan.

On the ninth day of the eighth month of the second year of Xianxi (265), Sima Zhao died, and his son Sima Yan succeeded to the throne of Xiangguo and King of Jin.

On November 12, Sima Yan usurped the power of Wei and established the Western Jin Dynasty, known as Emperor Wu of Jin, and the Wei State has since perished. On November 14, Cao Huan was relocated to Kim Yong City. When Cao Huan went out of the city, Taifu Sima Fu said goodbye to him, took his hand and wept and said: "I will be a loyal minister of Great Wei until I die." ”

On November 17, Emperor Wu of the Jin Dynasty named Cao Huan as the king of Chen Liu, with ten thousand households in the city, and the palace was arranged in Yecheng, giving him the use of the banner of the Son of Heaven, preparing the five-hour auxiliary car, and traveling to the Zhengshuo of the Wei State. Its status, treatment, and ending can be said to be the best among the emperors of all dynasties.

In the first year of Emperor Tai'an of Jin Hui (302), Cao Huan died in the feudal state of Chenliu at the age of fifty-eight, and the imperial court named him Emperor Yuan, and his descendants were called "Emperor Wei Yuan".

Cao Huan's descendants have not been recorded in official records, so it is impossible to know if he had any descendants, and since his death coincided with the Eight Kings Rebellion, many records may have been lost or destroyed during that period. The Eastern Jin Dynasty has always had the title of King Chen Liu, and the Southern Song Dynasty has a record of King Chen Liu's heir, but it is impossible to determine whether he is a descendant of Cao Huan, or a successor to the Cao family. There has always been a mound near the Yecheng site that is said to be the tomb of Cao Huan, which was later confirmed by archaeological excavations that it was not Cao Huan's tomb. In addition, the Chen Liufeng state started by Cao Huan and passed on to the Southern Qi Dynasty for 214 years.