Cheng of Jin, emperor of the Jin Dynasty (born 321)

Emperor Cheng of Jin

Emperor of Eastern Jin from 325 to 342

Emperor Cheng of Jin, personal name Sima Yan (司馬衍), courtesy name Shigen (世根), was an emperor of the Chinese Eastern Jin dynasty. He was the eldest son of Emperor Ming and became the crown prince on April 1, 325. During his reign, the administration was largely dominated by a…