Effective immediately, all minors are banned from playing online games in which players are allowed to kill other players, an activity that has been termed Player Kills (PK). China's Ministry of Culture (MOC) and Ministry of Information Industry (MII) have also ordered the country's online game operators to develop identity authentication systems that prevent minors from playing games These authentication systems would require all players to first enter their Citizen ID Card numbers before being allowed to play games that allow Player Kills.
...
Chinese authorities have significantly increased policing of online games since the second half of 2004, as part of government efforts to create a 'healthy' environment for children. As part of that same campaign, regulators have also cracked down on pornographic, violent, gambling, and 'superstitious' content disseminated over the internet and mobile phone networks.

How sweet, China is protecting the children. Hillary would be proud.

China bans violent video games for minors.