More than two hundred Chinese (game) companies have pledged to regulate their industry to combat gaming addiction.
They have signed a statement to that effect.
The statement was signed by 213 companies, including Tencent and NetEase.
The companies also promise to take action against "history-twisting" content.
The Chinese authorities last month introduced new rules that from now on children under the age of 18 are not allowed to play online for more than three hours a week.
They are only allowed to play online games on Fridays, public holidays and weekends between 8 p.m. and 9 p.m.
Providers must also verify the identity of young gamers if they want to log in.
The Chinese authorities say they ensure that game companies enforce the rules.
Tencent therefore already introduced a facial recognition function.
Parents can enable them to prevent children from using an adult's credentials to circumvent the government curfew.
See also: Three hours a week online gaming: this is how China takes action against game addictionKeywords: