Since Wikipedia.org seems to be inaccessible in mainland China by standard internet means, one might assume that one of the "legitimate" companies in the PRC might jump in. Guess what happened earlier on...

http://baike.baidu.com/ describes itself as a encyclopedia that is collaboratively written by its users or however you translate "这是一部由全体网民共同撰写的百科全书".

http://www.virtual-china.org/2006/04/baidus_alternat.html has a first review about it.

"Baidu's Baike [an alternate Chinese wikipedia] has finally formally launched. but it's nothing to get excited about...I looked around a bit and most of the articles are naked plagiarism. They've hypocritically put links to reference material at the bottom...Basically there's little of value here. When I looked carefully, this is the copyright contract: "Baidu owns all of the copyrights to material found on this website." How shameless. "

This system seams to feature some kind of karma/credit point system where different kind of actions might lead to an increasing score of your account.

Mathias, Die Klugheit von Wiki besser verstehen