2. Select the role that needs to be promoted, and click on the role information bar.

3. In the role information bar, select the "Potential" option.

4. In the Potential interface, select the "Key to Potential" option.

5. Click the "Use" button to consume a certain number of potential keys to unlock the potential of the character.

6. After releasing the potential, the character's ability will be improved and it can play a better role in the battle.