Mainland China is allegedly reported to be implementing a new policy that will require all games(Simplified Chinese version) made in the country to use real-name identification. Unauthenticated users will not be able to log in without identifying themselves as mainland Chinese citizens.
A Friendly Reminder:
Unauthenticated users should authenticate themselves as soon as possible. Those who are not able to provide real names and IDs are recommended to stop any in-game purchases immediately and use up any remaining items before the policy goes live in order to prevent losses.