"Ethnic groups in Chinese history" . "ethnic groups" . "Chinese ethnicities" . "Ethnic groups in Chinese history" . . . . "Ethnicity" . "non-Chinese ethnic groups" . . . "ancient peoples" . "ethnic groups in Chinese history" . "minorities in ancient China" . . "Hu" . "historical" . . . "''Hu-people''" . "non-Han ethnic groups" . "Chinese ethnicity" . "others" . "Hu people" . "ancient non-Han Chinese peoples" . "ethnicity" . "56 ethnic groups" . "barbarian" . "to the north" .