Since its foundation the Chinese government has shown to keep a tight grip on the content of its media. The media regulations endorsed by its laws allows the government to censor what China deems as a threat to their national security or reveal state secrets.
Additionally the law dictates they can censor anything that deems harmful to their political or economic interests. Seemingly these laws are extremely vague and allow the government to facilitate censorship at their own discretion.
Internet censorship in China has become increasingly obvious over the decade. Sites that contain sensitive phrases and violate China law have been blocked from the country entirely.
According to abcNEWS: "If an Internet user in China searches for the word "persecution," he or she is likely to come up with a link to a blank screen that says "page cannot be displayed."The same is true of searches for "Tibetan independence," "democracy movements".
OpenNet Initiative, an academic cooperative that tracks censorship issues says that China has the world's "most sophisticated" Internet filtering system.
Another form of internet censorship used by the Chinese government is banning access from websites around the world. They even issued an order stating that "the internet users of china including foreign organizations and individuals must abide by Chinese law and regulations".