I only worked with one chinese male colleague B4

We kinda have a good time. So...um...You're not referring to all the Chinese male workers, aren't you? However, I do agree with you that competition between Chinese people is everywhere and never end. You just have to take the fact and work it out.

In regards to overtime, it sucks when you have to stay late. But since you've done that for years, why it bothers you now when there are bunches of Chinese around? What's wrong with that?