Emperor Kang of Jin (simplified Chinese: 晋康帝; traditional Chinese: 晉康帝; pinyin: Jìn Kāng Dì; Wade–Giles: Chin K'ang-ti; late 322[1] – 17 November 344),[2] personal name Sima Yue (司馬岳), courtesy name Shitong (世同), was an emperor of the Eastern Jin dynasty (266–420).
After his father died in October 325 and was succeeded by his brother Emperor Cheng, Sima Yue was created the Prince of Wu in 326.
Emperor Cheng agreed and designated Sima Yue the Prince of Langya, despite the other top official He Chong (何充)'s opposition.
Most officials feared this large undertaking, but with support from Yu Bing, Huan Wen (Emperor Kang's brother-in-law, having married his sister Sima Xingnan (司馬興男) the Princess Nankang), and Sima Wuji (司馬無忌) the Prince of Qiao, Emperor Kang approved the plan and mobilized troops.
However, Yu Yi eventually, for reasons unknown, largely did not carry out his campaign, although he made some border attacks.