The Chinese government issued a new rule over the weekend, requiring primary and secondary schools in the country to install filters to prevent young people from accessing "obscene content" on the Internet.
According to the Ministry of Education, local education departments and schools should guide students in different age groups to "properly handle cyber world" and encourage them to report any suspicious websites.
The move was the ministry's latest effort, after a nationwide campaign last August, to echo the government's attempt to crack down on online pornography, including mobile WAP sites, reports Xinhua.
Under the name of anti-pornography, the Chinese government has been tightening its control in the digital world since last July, when a riot in Xinjiang broke out. Even now, the Internet service is still unavailable in the region.
In early January, the Shanghai operation and Beijing operation of China Mobile, the nation's largest mobile network carrier, said sending mobile porn, either through photos or messages, could have the phone number revoked permanently, but it didn't disclose any keywords it considered sensitive.
In a recent rebuke to the criticism by U.S. Secretary of State Hillary Rodham Clinton, who condemned China's control over Internet, China insisted the Chinese Internet is open.