You can save your game progress by linking it to your social media accounts. This can be Facebook, Google Play (Android devices), and Game Center/Apple ID (iOS devices). Just go to the game settings (click on the "gear" under your avatar) and select the desired social network.
Please note that game progress downloaded from Huawei App Galley cannot be saved or transferred between devices at this time. This feature will be added in future updates.
Important: when reinstalling/uninstalling the game, as well as when completely resetting the device to factory settings, progress can be restored on your own only if the game has been connected to a social network. Transferring progress to another device is also only possible using supported social networks.