| >> I belong to the race who works as domestic helpers in
>> HK and I should not be asking much from him
If you're senior enough, report him to his boss by simply asking if this is the company policy.
Fix issues like this, which are in your control pro-actively.
What Max suggested... plus ask the guy for his name and his supervisor's name and proactively go to the management office and report him.
Rest... sometimes you just cannot let it get to you and have to move on.
In my experience, racism can often be attributed to ignorance or stereotyping (which is ignorance + lots of hearsay) and rarely the malice and provocative behavior that you see in the western countries.
Lets just say.. things are much better here in HK, in 2007 than they were in 1997. | 
