Manchu already merged into Chinese. Chinese is not only referred to HAN people. Manchu never ruled over Korea silimar case is Vietnam. For Mongolia, it’s offical pact to let it be independent by ROC government. If you can find such agreement to let Taiwan independent by either ROC or PRC government, then we won’t bother to argue this topic.[/quote]
The Manchus had a very strict racial segregation policy throughout their entire rule of China. With Manchus as the top of the society and the Han as second class citizens. Because ultimately they were so much smaller in numbers, eventually especially after the 1911 revolution they were assimilated as Chinese. But it would be a stretch to claim all Manchu empire land to be intrinsic sacred Chinese land.