When did the present Mongolian Republic separate from China? Who signed it out? Related historical facts! !

19 1 1 After the Revolution of 1911 in China, some Mongolian ministries were pro-Russian, some demanded independence, and some were pro-China and stayed in China. After several repetitions, it finally formed an independent "Outer Mongolia" (namely Mongolia) and China's Inner Mongolia Autonomous Region. Some of them were annexed by Russia (e.g., Tangnuriang Sea).

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