I notice lots of Chinese girls have difficulty maintaining eye contact. If they don't know you well, they (especially the conservative or lower end ones) tend to lower their gaze and stare at the ground. At the other extreme, a few will thrust their nose up at the sky if you commit the unforgiveable sin of looking in their general direction. And lots of Chinese girls have this fcuked up expression on their face when looking at strangers, as if they are suffering from constipation.