Discrimination against any culture or race is also a form or bias.

"Raw objectivity" would be this instance says a lot about the common nature of human beings, the consequences of lack of accountability and oversight etc.

Drawing conclusion on Chinese people requires either strong empirical evidence, or prejudice.

Nobody is being prideful, your logic is shoddy. Your hypothesis and the null hypothesis both lead to the same observation. To disprove the null you have to actually observe non-Chinese not cheating. Given that half the comments here are people complaining about something similar happening in their own countries, the evidence points towards the null hypothesis.

(I'm an albino black Jew from Mars)