Japan left a large number of adherents to settle in the war of aggression against China. Why are there no Japanese and Yamato people in China?

This is related to the ethnic policy in the early days of the founding of the People's Republic of China. China's ethnic policy borrowed from the Soviet Union. This is bitter. To put it simply, there are no Japanese and no Yamato people. Most of the believers in No.1 Middle School were repatriated to China for the second time. Both are feuds between China and China. These three people have never lived for generations (for example, if a Japanese immigrates to another country, that country will not add another nation to its own country because of you alone. If that's the case, there should still be American race and French race in our country, so Yamato race can't exist as a nation in China.