You can link your account with the following steps:
1. Select [Player Info] - [Settings] - [Account Binding].
2. Select the method you want to link to.
(Only guest accounts that are not linked to other accounts can be linked.)

Please note that if you play the game with a guest account without linking your account, it will be difficult to recover your account after deleting the game or changing device.

We strongly recommend you to link your account before playing the game.