eldavojohn writes: One of China's main twitter services used by 30% of all Chinese internet users is called Sina Weibo (weibo is the Chinese word for 'microblog') and something that is quite different from the West's twitter is, of course, the enforced censorship. Researchers at Rice University in Houston have estimated numbers for how censorship works and identifies the "velocity of censorship" in China's microblogging censorship. Most of the posts are marked as "permission denied" between the five minute and ten minute marks after posting. Their research shows that "If an average censor can scan around 50 posts a minute, that would require some 1400 censors at any instant to handle the 70,000 posts pouring in. And if they work 8 hour shifts, that’s a total of 4200 censors on the payroll each day." The research indicates you would need a small army to meet stringent censorship policies when servicing China and to avoid being shutdown like Fanfou (another weibo). Keep in mind that this is not simply identifying keywords and blocking the post based on those words. The researchers noted that a phrase like “Secretary of the Political and Legislative Committee” will result in you being unable to submit your post to Sina Weibo. So the research examines the speed of ex post facto censorship which presumably requires an employee or perhaps government employee to identify "non-harmonious" posts based on their intrinsic content.