Comment by yorwba

I found this related Quora question: https://www.quora.com/Is-there-an-equivalent-of-Facebook-Con...

Of those mentioned in the answers, I think QQ would be your best bet. I have never seen anyone use Renren, but everyone seems to have a QQ number.

Another of those "everyone has it" apps is WeChat, which also provides OAuth: http://open.wechat.com/cgi-bin/newreadtemplate?t=overseas_op...