Chinese regulators have since 2017 sought to limit the amount of time minors spend playing video games and companies including Tencent already have anti-addiction systems that they say cap young users' game time. In practice, it is difficult for companies to stop children accessing games online because users can lie about their age. But authorities have in recent months placed fresh focus on protecting child wellbeing, and said they want to further strengthen rules around online gaming and education. Last month, they banned for-profit tutoring in core school subjects, attacking China's $120 billion private tutoring sector. That added to other regulatory action in the technology industry, including a ban on Tencent from exclusive music copyright agreements and a fine for unfair market practices.