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What was the total population of the three northeastern provinces at the end of Ming Dynasty?

At the end of the Ming Dynasty, there were about 500,000 Manchus, 6,543,800 Han, 300,000 Mongolians and 500,000 Koreans in Northeast China (Bingzi was plundered from North Korea at will, and later these people joined the Banners, and there were about 6,543,800 other nationalities, with a total of about 2.4 million).