Websites, featuring what the Chinese government has called vulgar content, have been closed down.
Over 90 websites containing pornographic and political material has been removed since China announced its Internet morality campaign.
China's ruling Communist Party has a history of engaging in web purges, in attempts to remove pornography, political criticism and web scams.
Officials have now threatened tougher penalties for those companies disseminating the material.
In the past the crackdown on Internet content has included the big search engines, Google, Microsoft's MSN and Baidu.
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