Your registered Netcom (that is, dream account) has not registered an ID number, so the anti-addiction system for minors included in the game limits the upper limit time and the income is halved. If you want to cancel, the system will give you a similar prompt when you log in to the game (don't click Cancel). Click the link to register with 18-year-old ID number and then enter the game. This will not happen.
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Register on this website with your ID card, and everything is done!