How long did Li Zicheng’s army control Beijing in 1644?

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Map of eastern Asia highlighting China and its neighboring countries, with an arrow pointing to Beijing Municipality in northeastern China. The map includes international boundaries, disputed borders, and lines of control, and shows major surrounding countries such as Russia, Mongolia, India, Japan, North Korea, and South Korea. An inset at the bottom left shows the location of China within Asia. — Beijing Beijing city and municipality, China.

Li Zicheng’s control over Beijing in 1644 was short-lived. After capturing the capital and proclaiming himself the first emperor of the Great Shun dynasty, his occupation lasted only about 40 days before he was driven out by a combined force of Manchu troops and the Ming general Wu Sangui.1