Sima Ai

Sima Ai or Sima Yi (司馬乂), courtesy name Shidu (士度), formally Prince Li of Changsha (長沙厲王), was a Jin dynasty imperial prince who briefly served as regent for his half-brother Emperor Hui. He was the fifth of the eight princes commonly associated with the War of the Eight Princes. Of the eight princes, he alone received praises from historians, for his attempt to reform government and his courtesy to Emperor Hui, who was developmentally disabled. According to the Book of Jin, Sima Ai was a strong and resolute man and was seven chi and five cun tall.