The Hakka, in five migrations, moved from Northern China to Southern China and even today are know as 'the guests'. When they began the migrations in the north, many had Caucasian features and those with those features were killed and persecuted all the way across China.
This is believed to be apocryphal.
Still, modern Japanese may be found who have a "bridge". There's also a vast number of them who have "beep" noses like Charley Brown.