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Wu Sangui (Chinese: 吳三桂; pinyin: Wú Sānguì; Wade-Giles: Wu San-kuei)had the courtesy name Changbai (長白) or Changbo (長伯) (1612 – October 2, 1678) .

He was a Ming general who committed an act which is still one of the most controversial in the entire history of China: he opened the gates of the Great Wall of China at Shanhai Pass to let Manchu soldiers, enemies of the Empire which he served, into China proper.

He did not, however, thus surrender to the Manchus until after the defensive capability of the Ming Empire had been greatly weakened by the armies of Li Zicheng. Wu was about to join the rebel forces of Li, who had already sacked Beijing, when he heard that his concubine Chen Yuanyuan had been taken by Li. Enraged, he contacted the Manchu and their leader Dorgon. The gates opened.

It is commonly believed that this act led to the ultimate destruction of the Ming Empire and the establishment of the Qing (Manchu) Dynasty, an uncommonly interesting era in Chinese history.

Wu was born in Gaoyou, Jiangsu Province to Wu Xiang (襄). He was rewarded with the position of Pingxi Wang (平西王) in Yunnan by the Qing imperial court, after he conquered the region from the remnants of Ming loyalists.

It had been extremely rare for someone outside of the royal family, especially a non-Manchu, to be granted the title of Wang (king). Those being awarded the title of Wang who were not members of the royal family were called Yixing Wang (异姓王，literally meaning "kings whose surnames are different from that of the emperor"). It was believed that Yixing Wangs didn't usually have good ends, largely because they were not trusted by emperors as members of the emperors' own family were.

Wu Sangui was not trusted by the Qing imperial court, but he was still able to rule his land with little or no interference from the imperial court, largely because the Manchus, a minority, needed time after their prolonged conquest to figure out how to impose the rule of a dynasty of foreigners on the vast Chinese society they held in their hands.

Wu Sangui, from his outpost in faraway Kunming, had foreseen an eventual clash with the imperial court, so he spent the years of peace consolidating his power in the region and building up his armies.

In 1674, he revolted against the Qing and started the Revolt of the Three Feudatories, declaring himself the "All-Supreme-Military Generalissimo" (Tiānxià Dōuzhāotǎo Bīngmǎ Dàyuánshuài 天下都招討兵馬大元帥). In 1678, he went further and declared himself the emperor of a new Zhou Dynasty, with the era name of Zhaowu (昭武). He made his capital at Dongting-Hu (洞庭湖), which was formerly Hengzhou (衡州) and is now Hengyang, Hunan. He died there in the same year of natural causes and was succeeded by his grandson Wu Shifan. The remnants of his armies were defeated soon thereafter.

Wu Sangui's son, Wu Yingxiong (吳應熊), married the fourteenth daughter (建寧公主) of Manchu emperor Hung Taiji.

Wu Sangui in contemporary China was regarded as a traitor and opportunist, due to his betrayal of both the Ming Dynasty and the Qing Dynasty.

His early life and military career were portrayed in the China Central Television show Jiangshan Fengyuqing (江山风雨情, which could be loosely translated as "Turmoil and love stories of the late Ming Dynasty").

Convention: use personal name
Temple names	Family name and first name	Period of reign	Era name
	Wú Sānguì (吳三桂)	March 1678 – August 1678	Zhāowǔ (昭武)
	Wú Shìfán (吳世璠)	August 1678 – 1681	Hónghuà (洪化)