Emperor Gong of Jin

Emperor Gong of Jin (zh-stp|s=晋恭帝|t=晉恭帝|p=Jìn Gōngdì; 386-421), was last emperor of the Eastern Jin Dynasty (265-420) in China. He became emperor in 419 after his developmentally disabled brother Emperor An was killed by the regent Liu Yu, and during his brief reign, actual power was in Liu Yu's hands. In 420, under pressure from Liu Yu, he yielded the throne to Liu Yu, ending Jin's long existence. Liu Yu founded Liu Song, and in 421, believing that the former Jin emperor posed a threat to his rule, had him asphyxiated with a blanket.

Early life

Sima Dewen was born to Emperor Xiaowu of Jin and his concubine Consort Chen Guinü in 386, as their second son, four years after Consort Chen had given birth to their oldest son, Sima Dezong. Contrary to the developmentally disabled Sima Dezong, who was described as even unable to put on clothes himself, feed himself, or be aware whether he was hungry or full, Sima Dewen was described as an intelligent child. From his childhood, he became accustomed to care for his brother, perhaps particularly in light of their mother's death in 390. Their father did not have any other sons. Despite Sima Dezong's developmental disability, however, Emperor Xiaowu appeared to not have considered not making him his heir and making Sima Dewen his heir instead. Indeed, in 387, when Sima Dezong was just five years old and Sima Dewen was just one, he created Sima Dezong crown prince. In 392, Emperor Xiaowu created Sima Dewen the Prince of Langye -- the most honored title for a prince after crown prince. In 396, Emperor Xiaowu was strangled by his favorite concubine Consort Zhang, and Sima Dezong became emperor (as Emperor An). Sima Dewen continued to care for his daily living.

During Emperor An's reign

Sometime during Emperor An's reign, Sima Dewen married his wife, Chu Lingyuan, who was from an aristocratic family. She bore him two daughters, Sima Maoying, later created the Princess Haiyan, and the later Princess Fuyang.

Throughout Emperor An's early reign, Sima Dewen received increasingly honorific offices, but had little actual power, as the power was initially in the hands of his uncle, the regent Sima Daozi the Prince of Kuaiji, and later in the hands of Sima Daozi's son Sima Yuanxian. The situation continued after Sima Yuanxian was overthrown by the warlord Huan Xuan in 402.

In 403, Huan Xuan forced Emperor An to yield the throne to him, temporarily ending Jin. Huan Xuan established a new state of Chu, and he created Emperor An the Prince of Pinggu and Sima Dewen the Duke of Shiyang, but kept them close to him to watch them. In 404, however, a rebellion by the general Liu Yu quickly led to Huan Xuan's destruction and Emperor An's restoration. When, however, later that year Emperor An and Sima Dewen fell into the hands of Huan Xuan's nephew Huan Zhen (桓振), Huan Zhen considered executing Emperor An to avenge Huan Xuan's young son Huan Sheng (桓昇), who was killed by the rebels. It took great pleading on Sima Dewen's part, explaining that neither he nor Emperor An had anything to do with Huan Sheng's death, for Huan Zhen to spare Emperor An. In early 405, Huan Zhen was defeated, and Emperor An and Sima Dewen returned to the capital Jiankang, but by this point power was in Liu Yu's hands, albeit in a power-sharing agreement with a number of allies that he had to recruit in his campaign against Huan Xuan.

As the years went by, Liu Yu gradually concentrated more and more power in his hands, destroying rivals including Liu Yi (劉毅), Zhuge Zhangmin (諸葛長民), and Sima Xiuzhi (司馬休之), while greatly showing his strength in campaigns destroying rival states Southern Yan, Western Shu, and Later Qin. Sima Dewen continued to be largely ceremonially honored but actually powerless during this period. In 416, during Liu Yu's campaign against Later Qin, Sima Dewen asked to undertake a mission in Luoyang, recently captured from Later Qin, to try to restore the imperial tombs of the early Jin emperors, but it is not known what came of the mission. He returned to Jiankang in 418 after Liu Yu destroyed Later Qin.

Late that year, Liu Yu, intending to seize the throne and believing a prophecy stating, "There will be two more emperors after Changming" ("Changming", which meant "dawn," was the courtesy name of Emperor Xiaowu), became intent on killing Emperor An and replacing him with Sima Dewen. However, because Sima Dewen continuously attended to his brother, assassins that Liu Yu sent to poison Emperor An did not have the opportunity to do so. However, around the new year 419, Sima Dewen was ill and had to be at his own house, and Liu Yu's assassin Wang Shaozhi (王韶之) took the opportunity to kill Emperor An. Liu Yu then declared Sima Dewen emperor, as Emperor Gong.


Emperor Gong's reign was a brief and powerless one. He created his wife Princess Chu empress in spring 419. He also promoted Liu Yu, then carrying the title Duke of Song, to the Prince of Song, which Liu Yu initially declined but accepted in fall 419. In spring 420, Liu Yu, then at Shouyang sent his assistant Fu Liang to Jiankang to pressure Emperor Gong to yield the throne. Emperor Gong responded by summoning Liu Yu back to the capital in summer 419, and Fu then offered him a draft of an abdication edict, requesting that he write it personally. Sima Dewen did so, and then left the palace and went to his old house while he was Prince of Langye. Three days later, Liu Yu took the throne and established Liu Song, ending Jin.

After abdication

Liu Yu created Sima Dewen the Prince of Lingling and built a palace for him near Jiankang. He also had the general Liu Zunkao (劉遵考), a distant cousin, lead a group of guards, ostensibly to protect the prince but instead to keep him under watch.

Soon, Liu Yu, still believing Sima Dewen to be a threat, sent Sima Dewen's former attendant Zhang Wei (張偉) a bottle of poisoned wine, ordering him to poison Sima Dewen. Zhang, not wanting to carry out the order, drank the wine himself and died. Meanwhile, however, in order to prevent any likelihood that Sima Dewen would have a male heir, Liu Yu ordered Princess Chu's brothers Chu Xiuzhi (褚秀之) and Chu Danzhi (褚淡之) to poison any male children that Princess Chu or Sima Dewen's concubines would bear. Sima Dewen himself feared death greatly, and he and Princess Chu remained in the same house, cooking their own meals, with Princess Chu paying for the material herself. Assassins that Liu Yu sent initially could find no change to kill the former emperor.

In fall 421, Liu Yu sent Chu Danzhi and his brother Chu Shudu (褚叔度) to visit their sister. As Princess Chu came out to meet her brothers in a different house, soldiers that Liu Yu sent intruded into Sima Dewen's house and ordered Sima Dewen to take poison. He refused, stating that Buddhist doctrines prohibited suicide and that those who committed suicide could not receive human bodies in the next reincarnation. The assassins therefore used a blanket to cover his head and asphyxiated him. He was buried with imperial honors.

Era name

* "Yuanxi" (元熙 Yuánxī) February 11, 419-July 10, 420

Personal information

* Father
** Emperor Xiaowu
* Mother
** Consort Chen Guinü, posthumously honored as Empress Dowager De
* Wife
** Empress Chu Lingyuan (created 419, d. 436), mother of Princesses Haiyan and Fuyang
* Children
** Sima Maoying (司馬茂英), the Princess Haiyan, later empress to Emperor Shao of Liu Song
** Princess Fuyang

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