There is a world of difference between policing the Internet, and censoring it.
I'm all for policing the net, weeding out paedophiles and fraudsters etc, but what is happening in China is a thinly veiled attempt to prevent the population from accessing any information that the state disapproves of. This includes information on 'Human Rights', 'China's own history' (only the state approved version anyhow), 'Democracy', 'Freedom of speech', etc.
I'm afraid to say, after visiting there, it's a policy that is proving remarkable effective, for the moment...
This type of rigid state control ALWAYS falls in the end, and the repercussions usually involve some form of civil disorder, property destruction and a period of instability and anarchy. It is a foolish attempt, by foolish old men to cling to power. Be grateful you have the opportunity to ask questions and receive answers here, as this site is almost certainly banned in China.