Professor Zhao Dingxin of the University of Chicago recently wrote about the micro-blog service in China. Sina's weibo is a knockoff of Twitter, which is banned in China. Zhao pointed out that because of the implementation differences in technical details, weibo is more dangerous than Twittter in subverting a government.
Chinese government recently arrested over a thousand people for 'spreading rumors' on weibo. This week, many outspoken celebrates found their weibo accounts closed.
Zhao also joined network criticism to youth leader Han Han. Zhao accused Han Han of using ghost writers. Han Han is believed the most dangerous voice against government corruption in China, and the most influential among young generations.