The updated law will take effect on June 1st, 2021.
To some extent, this is formalizing what China has done before. It was already exploring the ethics of game addiction, and developers like Tencent have already put checks in place. However, an explicit ban on addictive content could force sites and game creators to put checks in place to be safe, even if they’re not convinced kids will be hooked. While that will mostly affect China-focused digital goods, it could have an effect on the Chinese-made games and services you see elsewhere.