I wrote a long reply, but i don't think you need any more negativity. I don't think this was a good call on your part Dez, especially springing it on your parents so early. I know you wanted to share the news with them, but you must have known what they would have though. 1) he's not Chinese, 2) you did this so suddenly, 3) they don't even fully know the person yet.
I'm Chinese, so i can understand the part of your parents finding it hard to accept him. I know it has nothing to do with racism as some people in this thread thinks, it has to do with different cultures. Sometimes asian people realize that western people think our culture is wierd, strange, backwatered, superstitious, etc, etc, and they know that if your significant other isn't the same, then they might not be wholly accepting of it... which means the grandchildren will be raised with less of their culture and more of the western culture, and in many cases, their culture completely forgotten and ignored. Racism is believing that your race is superior to theirs, that their race is for some reason degenerate, i can tell you very few asian parents believe that... would we have moved to the west if we believed that?
Well, i really do hope you beat out the odds Dez.