If the young person plays for more than five hours a day, all of their credits will be taken away.
Online gamers will also be required to register using their real names and identity card numbers, which will indicate whether they are under the age of 18.
Companies must develop an anti-addiction system by June 15, fully test it by July 15 and implement it thereafter, according to the circular.
The departments issuing the circular included the State Press and Publication Administration, the education ministry and the public security ministry.