New York Times

Within its digital borders, China has long censored what its people read and say online. Now, it is increasingly going beyond its own online realms to police what people and companies are saying about it all over the world. For years, China has exerted digital control with a system of internet filters known as the Great Firewall, which allows authorities to limit what people see online. To broaden its censorship efforts, Beijing is venturing outside the Great Firewall and paying more attention to what its citizens are saying on non-Chinese apps and services.