Imagine China: a student called Ming from the Peking University attends a huge demonstration against the Chinese government. In the evening he writes a post on his blog about the event and shares his post on the social network Renren. He also sends all information by email to his friend, who lives in London. Unfortunatelly, the email does not reach his friend and his attempts to sign in to his blog fail. Chinese search engine Baidu cannot find the link to Ming's blog either, and his account on Renren becomes unavailable. What has happened with Ming's information? Why cannot he reach it on the Internet?