Xuancheng County in the Jin Dynasty was a new county, located in the territory of Yangzhou in the Western Jin Dynasty, and in the second year of Taikang (281 AD), Sima Yan split xuancheng county out of The eleven counties of Xuancheng, Wanling, Lingyang, Anwu, Jing, Guangde, Ningguo, Huai'an, Shicheng, Lincheng, and Chungu in Danyang County.
The Duke of Xuancheng Commandery of the Jin Dynasty was sima qi (司馬裒), the second son of Sima Rui (司馬瑞), and was sima Shao's half-brother, whose mother was the Xun clan of the palace people. Due to the humble status of his mother Xun, Sima Pei was raised by Sima Rui's wife Yu Mengmu after his birth, and sima Qi was later passed on to his uncle Sima Hun the Marquis of Changleting as an heir, and then he was renamed the Duke of Xuancheng Commandery and the general of Hou.
After Sima Rui established the Eastern Jin Dynasty, he once wavered on the issue of crown princes, and he was more optimistic about Sima Rui, believing that he had an adult instrument, stronger than his eldest son Sima Shao, but under the persuasion of Wang Dao, he eventually made Sima Shao crown prince. As for Sima Qi, he was renamed the Evil King of Lang, and after sima Xiao, the prince of Langya, he changed the 52,000 cadres of the two counties of Ji and Xuancheng to Sima Qi's food, and the story of the Duke of Xuancheng County also ended here.
![The Eastern Jin Dynasty was supported by the Wang, Xie, Yu, Huan and other gate valve clans? But Yu Liang's performance is really unsatisfactory[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)