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Full name
	Family name: Sīmǎ (司馬); Given name: Yao (曜);
Era dates
	Ningkang (寧康): 373–375; Taiyuan (太元): 376–396
Posthumous name
	Emperor Xiàowǔ; 孝武皇帝
Temple name
	Lièzōng (烈宗)

Emperor Xiaowu of Jin
晉孝武帝
Emperor Xiaowu of Jin; 晉孝武帝
9th Emperor of the Eastern Jin dynasty
Reign	12 September 372 – 6 November 396
Predecessor	Emperor Jianwen
Successor	Emperor An
Regent	Empress Dowager Chu Suanzi (373 – 376)
Born	362
Died	6 November 396 (aged 33–34); Jiankang, Eastern Jin
Burial	Longping ling (隆平陵), Nanjing, Jiangsu
Consorts	Empress Xiaowuding; Empress Dowager Ande
Issue	Emperor An; Emperor Gong; Princess Jinling
Full name
Full name
	Family name: Sīmǎ (司馬); Given name: Yao (曜);
Era dates
	Ningkang (寧康): 373–375; Taiyuan (太元): 376–396
Posthumous name
	Emperor Xiàowǔ; 孝武皇帝
Temple name
	Lièzōng (烈宗)
House	House of Sima
Dynasty	Eastern Jin
Father	Emperor Jianwen
Mother	Empress Dowager Xiaowuwen

Emperor Xiaowu of Jin (simplified Chinese: 晋孝武帝; traditional Chinese: 晉孝武帝; pinyin: Jìn Xiàowǔ Dì; Wade–Giles: Chin Hsiao-wu-ti; 362 – 6 November 396^[1]), personal name Sima Yao (司馬曜), courtesy name Changming (昌明),^[2] was an emperor of the Eastern Jin Dynasty in China. During his reign, Jin saw his dynasty survive a major attempt by Former Qin to destroy it, but he would nevertheless be the last Jin emperor to actually exercise imperial power, as his sons Emperor An and Emperor Gong would be controlled by regents and warlords. Emperor Xiaowu died an unusual death—he was killed by his concubine Honoured Lady Zhang after he insulted her.

Early life

Sima Yao was born in 362, when his father Sima Yu was Prince of Kuaiji and prime minister for his grandnephew, Emperor Ai. Sima Yao's mother, Li Lingrong, was originally a servant involved in textile production but, based on a magician's words that she would bear his heir (his sons all having died early by that point), Sima Yu took her as his concubine and she gave birth to Sima Yao. As he was born at dawn, she named him Yao, with the courtesy name Changming, both meaning "dawn". A year later she gave birth to his brother, Sima Daozi. As the oldest surviving son of Sima Yu, Sima Yao was designated as the heir apparent early in his life, and in 365, when he was just three years old, Emperor Fei offered the greater title of Prince of Langya to his father and the title of Prince of Kuaiji to him. Sima Yu declined, both personally and on his son's behalf, and Emperor Fei did not insist on them taking on the greater titles.

In 371, having lost a devastating battle to the Former Yan general Murong Chui in 369, the paramount general Huan Wen accused Emperor Fei of impotence and of not being the biological father of his sons. He then deposed him and made Sima Yu the new emperor (as Emperor Jianwen), although actual power was in Huan's hands. In 372, Emperor Jianwen grew ill and he named Sima Yao crown prince on 12 September^[3] but in his will, he offered the throne to Huan, if he wanted it. When his official Wang Tanzhi (王坦之) objected, Emperor Jianwen gave approval for an amendment, written by Wang, wherein Huan was only compared to the statesmen Zhuge Liang and Wang Dao. Nevertheless, when Emperor Jianwen died, many officials were apprehensive of Huan, and not immediately willing to declare Crown Prince Yao as the new emperor. Finally, at the instigation of Wang Biaozhi (王彪之), Crown Prince Yao took the throne as Emperor Xiaowu.

Early reign

The new emperor was only 10 years old. Therefore, his cousin Empress Dowager Chu (Emperor Kang's wife and niece of Xie Shang) served as regent, but the decisions were actually being made by Xie An and Wang Tanzhi; Huan Wen, apparently fearful of being entrapped, declined an offer to be regent. In 373, Huan Wen died and the fears of a Huan usurpation dissipated as his brother and successor, Huan Chong, was committed to the survival of the imperial government.

A major issue for the Jin government was the continued military pressure exerted by the powerful northern rival, Former Qin. In 373, Former Qin attacked and seized Jin's Liang (梁州, modern southern Shaanxi) and Yi (益州, modern Sichuan and Chongqing) provinces. Internally, however, Jin was apparently well-governed by Xie and Huan Chong.

On 1 October 375, Emperor Xiaowu married Wang Fahui (the daughter of the official, Wang Yun (王蘊)) as his empress.^[4] He was 13 and she was 15. He also started studying the Chinese classic texts and writing poetry. In 376, Empress Dowager Chu officially removed herself from the regent position and returned her powers to Emperor Xiaowu,^[5] although the decisions were still largely being made by Xie.

In 376, the Jin vassal, Former Liang, was attacked by Former Qin. Jin forces, under Huan Chong's command, attempted to relieve the pressure on Former Liang by attacking Former Qin, but Former Liang fell quickly and Huan Chong withdrew his forces. In apprehension of a Former Qin attack, Jin evacuated much of its population north of the Huai River to regions south of the river.

In 378, Former Qin made major attacks against the important Jin cities of Xiangyang, Weixing (魏興, in modern Ankang, Shaanxi), and Pengcheng. While general Xie Xuan was able to immediately recapture Pengcheng after it fell, Xiangyang and Weixing were taken by Former Qin forces in 379.

On 24 October 380, Empress Wang died. Emperor Xiaowu did not have another empress for the rest of his life.

In 381, Emperor Xiaowu began to study Buddhist sutras and he established a Buddhist study hall inside his palace, inviting monks to live within.

In 383, Huan Chong made a counterattack against Former Qin, hoping to recapture Xiangyang and the southwest. However, after initial losses, Huan abandoned the campaign.

The Battle of Fei River

In November 383, Former Qin's emperor, Fu Jiān, launched a major attack against Jin, intending to destroy it and unite China. At the Battle of Fei River, however, his forces panicked after trying to retreat to draw Jin forces across the river, and his army was routed with great losses, including his brother and prime minister, Fu Rong. Former Qin began to collapse after this defeat and never again posed a threat to Jin.

Middle reign

After defeating Former Qin forces, Xie Xuan spearheaded a campaign to regain lost territory, and Jin captured most of the Former Qin provinces south of the Yellow River, as well as regaining Liang and Yi provinces. However, Prime Minister Xie An, who was most credited with the victory, began to lose favor in Emperor Xiaowu's eyes; Xie's son-in-law, Wang Guobao (王國寶), unhappy that Xie did not give him important posts, began to flatter both Emperor Xiaowu and his brother, Sima Daozi, the Prince of Kuaiji, as a means of undercutting Xie. Xie remained prime minister, however, until his death in 385; he was replaced by Sima Daozi. Both Emperor Xiaowu and Sima became obsessed with feasting and drinking, and neither spent much time on affairs of state.

In 387, Emperor Xiaowu named his oldest son, five-year-old Sima Dezong, crown prince,^[5] notwithstanding the fact that Sima was developmentally disabled—so severely that even after he grew older, he was described as not being able to talk, dress himself, or to tell whether he was full or hungry while eating.

In 390, Emperor Xiaowu began to tire of how his brother, Sima Daozi, was taking his favors for granted, and he decided to look for counterbalancing forces. He made the officials Wang Gong (王恭, Empress Wang's brother) and Yin Zhongkan (殷仲堪) key regional governors, despite warnings that both Wang and Yin were talented but narrow-minded, and might create issues later.

Late reign

By 395, the conflict between Emperor Xiaowu and Sima had flared into the open, but because of the intercession of Empress Dowager Li, Emperor Xiaowu did not remove his brother.^[5] After further mediation by Xu Miao (徐邈), the relationship between the brothers seemed to be restored.

By 396, Emperor Xiaowu was spending so much of his time on drinking and women that he was not tending to important matters of state. His favorite consort was the beautiful Honoured Lady Zhang. On 6 November 396, when she was almost 30 years old, Emperor joked at a feast saying, "Based on your age, you should yield your position. I want someone younger." That night, after Emperor Xiaowu fell drunk, she ordered all the eunuchs away, bribing them with wine, and then ordered her servant girls to suffocate Emperor Xiaowu by putting a blanket over his face. She further bribed the attendants and claimed that the emperor died suddenly in his sleep. The death was not investigated and the next day, Sima Dezong assumed the throne as Emperor An, with Sima Daozi as regent.

Era names

Ningkang (寧康, níng kāng): 9 February 373 – 8 February 376
Taiyuan (太元, tài yuán): 9 February 376 – 12 February 397

Family

Consorts and Issue:

Empress Xiaowuding, of the Wang clan of Taiyuan (孝武定皇后太原王氏; 360–380), personal name Fahui (法慧)
Empress Dowager Ande, of the Chen clan (安德皇太后陳氏; 362–390), personal name Guinü (歸女)
- Sima Dezong, Emperor An (安皇帝司馬德宗; 382–419), first son
- Sima Dewen, Emperor Gong (恭皇帝司馬德文; 386–421), second son
Guiren, of the Zhang clan (貴人張氏)
Unknown
- Princess Jinling (晉陵公主; d. 432)
  - Married Xie Hun of Chen, Duke Wangcai (陳郡謝混; d. 412)
  - Married Wang Lian of Langya (琊瑯王練)

Ancestry

Sima Jin (256–290)

Emperor Yuan of Jin (276–323)

Xiahou Guangji (d. 307)

Emperor Jianwen of Jin (320–372)

Zheng Kai

Empress Dowager Jianwenxuan (d. 326)

Lady Wu of Puyang

Emperor Xiaowu of Jin (362–396)

Empress Dowager Xiaowuwen (351–400)

References

^ According to Sima Yao's biography in Book of Jin, he died aged 35 (by East Asian reckoning) on the gengshen day of the 9th month of the 21st year of the Taiyuan era of his reign. This corresponds to 6 November 396 in the Julian calendar. [(太元二十一年)九月庚申，帝崩于清暑殿，时年三十五] Jin Shu vol. 09. Thus by calculation, his birth year should be 362.
^ In Zizhi Tongjian, Emperor Xiaowu was known by this name before he received any title.
^ ji'wei day of the 7th month of the 2nd year of the Xian'an era, per vol. 103 of Zizhi Tongjian
^ gui'si day of the 8th month of the 3rd year of the Ningkang era, per vol. 103 of Zizhi Tongjian
^ ^a ^b ^c Fang (648).

Fang Xuanling 房玄齡, ed. (648). 晉書 [Book of Jin] (in Chinese). Vol. 9. Retrieved 22 July 2017.
Sima, Guang: Comprehensive Mirror in Aid of Governance (Zizhi Tongjian)

Regnal titles
Emperor Xiaowu of Jin House of Sima Born: 362 Died: 396
Preceded by Emperor Jianwen of Jin	Emperor of China Eastern Jin 372–396 with Empress Dowager Chu (372–376)	Succeeded by Emperor An of Jin
Preceded by Fu Jiān		Succeeded by Emperor An of Jin