Chinese central government doesn't need to even lead public opinion: it just selectively stops censorship. In other words, just as censorship is a political tool, so is the absence of censorship.
One Chinese tweet is equal to 3.5 English tweets. ... Because of this, the Chinese really regard this microblogging as a media, not only a headline to media.
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.