Update: My apologies. I cited the wrong Census data table when describing my definition of the middle class. A corrected version is below.
BEIJING — This great city is the epicenter of a geopolitical battle over cyberspace, who controls it, and who defines its rights and freedoms. China’s 485 million web users are the world’s largest online population. And the Chinese government has developed the world’s most advanced Internet censorship and surveillance system to police their activity.