How many Chinese have you met?
I have a good friend who is Chinese--he was born in Kwangtung Province--and is a dentist. Although his office is close to Koreatown in Los Angeles, he has no Korean patients.
His last name is common in both China and Korea, and he says that when prospective Korean patients call him and find out that he's Chinese, they hang up. There seems to be a bitter animosity between Chinese and Koreans.
Chinese?
How many Japanese have yo met? Nobody else holds a candle.