There is a long tradition in China for writers and journalists to take pen names, partly as protection from retaliation by authorities. If Facebook requires the use of real names, that could potentially put Chinese citizens in danger.
Social media changed Chinese mindset. More and more Chinese intend to embrace freedom of speech and human rights as their birthright, not some imported American privilege. But also, it gave the Chinese a national public sphere for people to, it's like a training of their citizenship, preparing for future democracy.
China is a BRIC country. BRIC country means Brazil, Russia, India and China. This emerging economy really is helping the revival of the world economy.
You have Google, we have Baidu. You have Twitter, we have Weibo. You have Facebook, we have Renren. You have YouTube, we have Youku and Tudou. The Chinese government blocked every single international Web 2.0 service, and we Chinese copycat every one.