They kicked out all the people that did not fit the Han identity, so lots of the peoples that populate SEAsia today lived in what is now China. Those left in C

They kicked out all the people that did not fit the Han identity, so lots of the peoples that populate SEAsia today lived in what is now China. Those left in China, see themselves as unified Chinese people --they all adopted the mainstream prevalent culture --and don't long any erased ancient culture they might have had. They do not consider themselves as the remnants conquered tribes who were abused or decimated and subjugated by the Han. They see themselves, from their point of view as Han Chinese. Even Manchurians who at one point subjugated and controlled China, today see themselves as Chinese as any other Chinese in Beijing or Wuhan. They assimilated and took to Han culture and practice Han culture so much they are all one and the same today --with two exception and that is in their northwest and southwest --and those because those were very recent conquests. Most likely those in the southwest will assimilate despite a an exiled renegade spiritual leader who opposes the inevitable.