“China lost its Middle Kingdom with the end of Ming Dynasty. Lost its Han ethnicity with the conquest by the Qin Dynasty, lost its face with the Cultural Revolution, and then lost its morality with economic reform.”
Cheng Li
Senior Fellow and Director, John L. Thornton China Center
The Brookings Institution
Hebrew Hutong 
I wouldn’t say lost it’s Han ethnicity, it has only been reinforced in the last two decades. That said, i did go to an ethnic minority Uni in BJ.