BEIJING, June 14 (Xinhua) -- Chinese authorities have begun a campaign to crack down on web novels with vulgar or obscene content, delivering improper ideas to the public, or involved with copyright infringement.

The campaign, jointly launched by the State Administration of Press and Publication and the National Office Against Pornographic and Illegal Publications, began in May and will run until August.

It will also shut down websites and apps that are against basic moral values or not capable of proper operation, and handle with a number of cases, according to a news conference Thursday.

The two authorities have, in coordination with other departments, closed more than 400 literature websites based both in China and overseas that had violated laws and regulations.