China's social networks are heavily censored, and examining what's pulled and what's allowed to remain offers insights into Beijing's evolving political sensibilities, researchers say. Harvard University's Gary King says software he developed spots small changes in censorship patterns, and is able to predict major policy shifts or political events days before they actually happen. "We have examples where it's perfectly clear what the Chinese government is about to do. It conveys way more about the Chinese government's intents and actions than anything before," King says.

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