In Germany is same. Chinese are really a bit kept from the sociaty.
For example, me
1) i am not sure what i shall chat and what i shall not chat, and how long
2) i do not know how to chat with a guy which businessly not that close to me--> i am a bit fraid of rumor
3) and more trouble for me: i do not know how to get me mixed in a girls group. shall i be that gossip? they are too younger or too older for me.
For younger, i do not know how to talk about pops, bars, and guys or boyfriends...
For older, i am not that old.
I just find too less people with same background as me....