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Emperor Jianwen of Jin

Sima Yu
Reign 372
Born 320
Died 372 (aged 52)
Full name
Family name: Sima (司馬)
Given name: Yu (昱, yù)
Era dates
Xianan 咸安
Posthumous name
Jianwen (簡文, jiǎn wén),
literary meaning:
"undiscriminating and civil"
Temple name
Taizong (太宗, taì zōng)
Father Emperor Yuan of Jin
Full name
Family name: Sima (司馬)
Given name: Yu (昱, yù)
Era dates
Xianan 咸安
Posthumous name
Jianwen (簡文, jiǎn wén),
literary meaning:
"undiscriminating and civil"
Temple name
Taizong (太宗, taì zōng)

Emperor Jianwen of Jin (simplified Chinese: 晋简文帝; traditional Chinese: 晉簡文帝; pinyin: Jìn Jiǎnwén Dì; Wade–Giles: Chin Chien-wen-ti; 320 – September 12, 372), personal name Sima Yu (司馬昱), courtesy name Daowan (道萬), was an emperor of the Eastern Jin Dynasty (265-420) in China. He was the younger brother of Emperor Ming and installed by military leader Huan Wen. Prior to taking the throne, he had served in important roles in the administrations of his grandnephews Emperor Mu, Emperor Ai, and Emperor Fei. Both in his service to his grandnephews and in his own reign as emperor, he is generally viewed as a weak-willed figure who showed enough wisdom to continue to survive and extend Jin rule, but whose effectiveness was also compromised by his over-dedication to philosophical discussions of Taoism and other related philosophies.

Sima Yu was born in 320, as the youngest son of Emperor Yuan, by his favorite concubine Consort Zheng Achun (鄭阿春). As Emperor Yuan's wife Yu Mengmu (虞孟母) had died years earlier (in 312), and the mother of his oldest son Sima Shao the Crown Prince (later Emperor Ming), Lady Xun, had been forced to leave the palace due to Princess Yu's jealousy while she was still alive, Consort Zheng was effectively the mistress of the palace, although she never carried the title of empress. In 322, Emperor Yuan created him the Prince of Langye—the same title that Emperor Yuan had earlier, which was therefore considered a special honor.


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