China Social Networks API

We are looking for coders from China familiar with the most successful social networking websites from China : RenRen, Kaixin001, Qzone, [login to view URL] API development tools. 1/We want users to be able to login on our website (asp.net, c#, ms sql 2005) using the Chinese social networks. We need to be able to collect the user info. Please advise : list of sites list of info that can be collected for each site 2/We then want to publish our website's info into the users ' wall of the social network websites Please advise : list of sites for which we can do that exactly what info can we publish do we need user authorization each time we want to publish on the wall ? are the walls same as facebook or different ? please explain for each individual site thank you