Brother, there are a number of reasons why the UK babes treat you this way, and I will just touch on a few. One, the ladies must consider you too short for them being 172 cm (or was it 176cm). They want a guy they can look up to (bothe physically and mentally), and not a guy they look down at (or on). Even being on an eye-to-eye level is not good enough for most women WORLDWIDE.
Secondly, there is a stereotype that your **** is too small. Like the pens you find in bookie (betting) shops. Or like cigarettes. Some dude showed a girl his **** during fresher's and she told him "Sorry, I don't smoke."
Thirdly, Chinese people like their spices a whole lot and they tend to overindulge in them, leaving them with very healthy bodies, but deadly-smelling breath. Sometimes you can smell it on them even without them speaking.
Anyway, the solution to the height problem is to wear high platform shoes, 5 inches or more in order to increase your height and be more imposing. For the small **** problem, rub your **** a bit before approaching a girl so it looks bigger. You can also try putting a carrot or a banana in your boxers before leaving the house. Also, always pop your midriff forward while talking to a woman to accentuate what you are packing below. Finally, for the bad breath problem, carry breath mints around wherever you go. Or carry some perfume or air freshener wherever you go and spray it whenever you are talking to people. This should help.