Self-censorship is Best

American Internet firms typically arrive in China expecting the government to hand them an official blacklist of sites and words they must censor. They quickly discover that no master list exists. Instead, the government simply insists the firms interpret the vague regulations themselves. The companies must do a sort of political mind reading and intuit in advance what the government won't like. Last year, a list circulated online purporting to be a blacklist of words the government gives to Chinese blogging firms, including "democracy" and "human rights." In reality, the list had been cobbled together by a young executive at a Chinese blog company. Every time he received a request to take down a posting, he noted which phrase the government had objected to, and after a while he developed his own list simply to help his company avoid future hassles.

The penalty for noncompliance with censorship regulations can be serious. An American public-relations consultant who recently worked for a major domestic Chinese portal recalled an afternoon when Chinese police officers burst into the company's offices, dragged the C.E.O. into a conference room and berated him for failing to block illicit content. "He was pale with fear afterward," she said. "You have to understand, these people are terrified, just terrified. They're seriously worried about slipping up and going to jail. They think about it every day they go into the office."

As a result, Internet executives in China most likely censor far more material than they need to. The Chinese system relies on a classic psychological truth: self-censorship is always far more comprehensive than formal censorship. By having each private company assume responsibility for its corner of the Internet, the government effectively outsources the otherwise unmanageable task of monitoring the billions of e-mail messages, news stories and chat postings that circulate every day in China. The government's preferred method seems to be to leave the companies guessing, then to call up occasionally with angry demands that a Web page be taken down in 24 hours.