There is an excellent write up on Techcrunch by guys at Web2Asia, which can get you up to speed on China social networking sites.
Bulletin Board Systems (BBS) have long played the dominating role in Chinese Internet life and still continue to be one of the most popular online platforms for social interaction. Registered user accounts, which are mostly anonymous, surpass 3 billion (users have multiple accounts) and 80% of Chinese sites run their own BBS. However in the last year social networking services, most of which require real name registrations, have shown explosive growth in China with 19.3% of netizens using them regularly.
