Emperor Xiaowu of Jin.

About Emperor Xiaowu of Jin

Emperor Xiaowu of Jin, personal name Sima Yao (司馬曜), courtesy name Changming (昌明), was an emperor of the Eastern Jin Dynasty in China. During his reign, Jin saw his dynasty survive a major attempt by Former Qin to destroy it, but he would nevertheless be the last Jin emperor to actually exercise imperial power, as his sons Emperor An and Emperor Gong would be controlled by regents and warlords. Emperor Xiaowu died an unusual death—he was killed by his concubine Honoured Lady Zhang after he insulted her.