>There are many ethnicities in China, people of all genetic backgrounds. It is the culture that is the problem, not the race.
This just seems like nitpicking to me. Colloquially most people would classify discrimination based on country of origin, or "culture" (whatever that means) as racism, even if it doesn't meet the technical definition. For instance Trump's travel bans have been called by many as "racist", even though it covers a bunch of countries, and even though the countries are majority muslim, it also excludes major muslim countries like Pakistan and Indonesia.