From CNet News:
China is winning the war on Internet pornography but it will be hard to eradicate entirely as many Web sites are based outside of the country, a senior police official said Thursday.
China routinely blocks access to Internet sites on sensitive subjects such as self-ruled Taiwan, which China regards as its own, and the 1989 Tiananmen Square pro-democracy demonstrations, which were crushed by the military with heavy loss of life.
Regulations also target sites that publish fabricated information and content deemed to harm national security.
“The spread of Web sites that involve pornography has been bought under effective control,” Zhao Shiqiang, vice head of the Ministry of Public Security’s Internet security and supervision bureau, told a news conference.