" There is the “Great Firewall,” which blocks access to tens of thousands of websites the Chinese government doesn’t want citizens to see. The “Golden Shield” is an online surveillance system that uses keywords and other tools to shut down attempts to access content that the state considers politically sensitive. There is an ever expanding list of words and phrases that trigger denial messages online. More recently, China has moved on offense by introducing the “Great Cannon,” which can alter content accessed online and attack websites that the state considers dangerous to China’s security via a “dedicated denial of service” attack that can overwhelm servers to knock them offline. "

― Ian Bremmer , Us vs. Them: The Failure of Globalism