Martin makes a good point but there seems to be 2 essential things missing from this thread so far..

1) Chinese people are awesome at stereotyping. As far as they are concerned, ANY western male in China is here for one thing only - to bed as many women as possible in the shortest possible time.

2) Secondly as Martin says, they are usually looking for a long-term-relationship ("Hello, nice to meet you, will you marry me?' kind-of attitude) and so the 'laowai' in China is often seen as being 'here today, gone tomorrow' and as such, not the 'ideal' partner to introduce to 'mummy and daddy'

Don't be in a rush to meet someone - if it's going to happen, it will.