司馬遹
In fall 344, Emperor Kang grew ill. Yu Bing and Yu Yi wanted to support his uncle Sima Yu the Prince of Kuaiji as emperor, but He Chong, consistent with his prior advice to Emperor Cheng, suggested that Emperor Kang should pass the throne to his son Sima Dan. Emperor Kang agreed and created Sima Dan crown prince. He died two days later, and was succeeded by the one-year-old Crown Prince Dan (as Emperor Mu).