As much as that would have been my dream in early 20's to break in a virgin Asian woman, actually doing it when you are older is kind of irresponsible imo. Especially, if she gets clingy and you was planning something on strictly temporary basis.

I'd also argue that some women of that age in China aren't quite ready, in the same way that you wouldn't usually bang a 16 year old bird in the U.K despite it being completely legal. There's the immaturity issues etc. But once they're 20 or 21... She's definitely an adult, so why not?

Then again, if I was a young international student studying Chinese in China... It would be fair game, really.