China has shut down more than 4,000 porn and other websites containing "harmful" information in the past three months. The "clean-up" campaign was jointly launched by the National Office Against Pornographic and Illegal Publications and the State Administration of Press and Publication in May.

By the end of August, authorities nationwide amended over 120 relevant violations and ordered 230 enterprises to rectify irregularities, removing or filtering more than 147,000 pieces of harmful information, Xinhua news agency quoted an official statement.