Emperor Yuan of Jin (; 276 – 3 January 323), personal name
Sima Rui (司馬睿), courtesy name
Jingwen (景文), was an emperor of the
Jin Dynasty and the first of the Eastern Jin. His reign saw the steady gradual loss of Jin territory in the north, but entrenchment of Jin authority south of the
Huai River and east of the
Three Gorges, and for generations Jin was not seriously threatened by
Wu Hu kingdoms to the north.