After Ming conquest, same Ming general tried to bifurcate China segregating South China from the rest of China, even in this case Manchus saved the integrity of United China. Then they added more territories in Qing Empire until the frontiers with India.
That was the time of Mahajanapada in India. Also no entity called China existed at time of Buddha.
There you go, eating your own words, admitting that Manchu allied Ming. Your post were brainless fabrication of history for trolling purpose. My point is proven.