Brett
Speaking as a father, I would hope my daughter never married anyone from a far away place, whoever they are. I want her always near to me, so I can take care of her and enjoy her company. The only way I would feel happy about it is if I felt that the man who wished to marry her treated her with great respect and adored her. If I saw that she glowed with happiness when they were together, then I wouldn't feel so bad about it.
Some assorted suggestions:
1. if you are nervous, it is better to smile than to look all sour and unpleasant
2. avoid all suggestion of bad habits (eg no drinking or smoking)
3. speak quietly
4. have some understanding of chinese culture and traditions
5. treat her parents respectfully, like you would important people
6. avoid familiarity, take care about how you act and behave
7. it's better to say nothing, than to talk nonsense or cause offence
8. ask your woman to guide you and follow her example
9. be generous with your compliments
10. offer suitable gifts, not too small and not too big.
Danny