In case of re-installation, or change of device, you can load your game date and continue playing, if you link your account.

◆ How to link an account

-> Enter the game > Tap the icon with three line bar(above the map icon) -> Account -> Link Account -> Google/Facebook/E-mail

Each account can be linked with Google/Facebook/E-mail together. 

And, please refer to that your account may be in danger of loss if you use inactive email address.