China has shut down thousands of websites and online accounts following a three-month campaign against “harmful” content, the state news agency Xinhua has announced.
The content, on 4,000 sites, included infringements of copyright and material spreading “improper values, vulgarity or obscenity”, it said.
But the purge also appeared to be aimed at platforms offering free e-books.
China tightly controls the country’s internet access.
Previous targets have included lottery apps and material containing pornographic or violent content.