The Qing dynasty, officially the Great Qing, was the last imperial dynasty of China. It was established in 1636, and ruled China proper from 1644 to 1911. It was preceded by the Ming dynasty and succeeded by the Republic of China. The Qing multi-cultural empire lasted for almost three centuries and formed the territorial base for modern China. It was the fifth largest empire in world history. The dynasty was founded by the Manchu Aisin Gioro clan in Manchuria. In the late sixteenth century, Nurhaci, originally a Ming Jianzhou Guard vassal, began organizing "Banners", military-social units that included Manchu, Han, and Mongol elements. Nurhaci formed the Manchu clans into a unified entity and officially proclaimed the Later Jin in 1616. By 1636, his son Hong Taiji began driving Ming forces out of the Liaodong Peninsula and declared a new dynasty, the Qing.
In an unrelated development, peasant rebels led by Li Zicheng conquered the Ming capital, Beijing, in 1644. Rather than serve them, Ming general Wu Sangui made an alliance with the Manchus and opened the Shanhai Pass to the Banner Armies led by the regent Prince Dorgon. He defeated the rebels and seized the capital. Resistance from the Southern Ming and the Revolt of the Three Feudatories led by Wu Sangui delayed the complete Qing conquest of China proper by nearly four decades. The conquest was only completed in 1683 under the Kangxi Emperor (1661–1722). The Ten Great Campaigns of the Qianlong Emperor from the 1750s to the 1790s extended Qing control into Inner Asia. During the peak of the Qing dynasty, the empire ruled over the entirety of today's Mainland China, Hainan, Taiwan, Mongolia, Outer Manchuria and Outer Northwest China. The early Qing rulers maintained their Manchu customs, and while their title was Emperor, they used "Bogd khaan" when dealing with the Mongols and they were patrons of Tibetan Buddhism. They governed using Confucian styles and institutions of bureaucratic government and retained the imperial examinations to recruit Han Chinese to work under or in parallel with Manchus. They also adapted the ideals of the Chinese tributary system in asserting superiority over neighboring territories such as Korea.
The high point of the dynasty came in the late 18th century. By 1800 it steadily deteriorated into poverty and rebellion because of massive internal revolts, heavy foreign pressure, excessive population growth and too-slow adaptation of its governance and its technology. The population rose to some 400 million, but taxes and government revenues were fixed at a low rate, leading to fiscal crisis. Corruption set in, rebels tested government legitimacy, and ruling elites failed to change their mindsets in the face of changes in the world system. Following the Opium Wars, European powers led by Great Britain imposed "unequal treaties", free trade, extraterritoriality and treaty ports under foreign control. The Taiping Rebellion (1850–1864) and the Dungan Revolt (1862–1877) in Central Asia led to the deaths of some 20 million people, most of them due to famines caused by war. In spite of these disasters, in the Tongzhi Restoration of the 1860s, Han Chinese elites rallied to the defense of the Confucian order and the Manchu rulers. The initial gains in the Self-Strengthening Movement were lost in the First Sino-Japanese War of 1895, in which the Qing lost its influence over Korea and the possession of Taiwan. New Armies were organized, but the ambitious Hundred Days' Reform of 1898 was turned back in a coup by the conservative Empress Dowager Cixi (1835–1908), who was in control of the national government (with one interruption) after 1861. When the Scramble for Concessions by foreign powers triggered the violently anti-foreign "Boxers" in 1900, with many foreigners and Christians killed, the foreign powers invaded China. Cixi sided with the Boxers and was decisively defeated by the eight invading powers, leading to the flight of the Imperial Court to Xi'an.
After agreeing to sign the Boxer Protocol, the government initiated unprecedented fiscal and administrative reforms, including elections, a new legal code, and abolition of the examination system. Sun Yat-sen and other revolutionaries competed with constitutional monarchists such as Kang Youwei and Liang Qichao to transform the Qing Empire into a modern nation. After the deaths of Cixi and the Guangxu Emperor in 1908, the hardline Manchu court alienated reformers and local elites alike by obstructing social reform. The Wuchang Uprising on 11 October 1911, led to the Xinhai Revolution. General Yuan Shikai negotiated the abdication of Puyi, the last emperor, on 12 February 1912. More details
