why there are massive chinese girl marry foreign men but not vice versa?

I think it's got something to do with their culture. Especially when China has way more female citizens than male. Eventually if there are too many women, there are those that have to search a partner within different spots. It's important there that women have a partner since there are still some problems with the importance between man and woman. I think it's this, not too sure. (Eventually also since men will lead big families there, the man is of greater importance, so the girls will go easily to those, making the men unneeded of searching)