China has shut down 1,222 websites as part of moves to rid the country of online pornography, the State Internet Information Office said on Friday.

The websites including some on medical treatment and health, were closed for providing videos or photographs of a pornographic nature, or linked to porn websites abroad, the office said in a statement.

About 2,200 pieces of text containing pornographic information have been deleted in the "Cleaning the Web 2014" campaign, it added.

The campaign started in April and is scheduled to end in November.

The campaign has been effective, the office said, adding more efforts will be taken to curb the spread of pornography on the Internet.