Ace racing is a mobile phone game. If you want to modify the blank name in the game, you can follow the following steps:

1. Open the game and enter the main interface of the game.

2. Click the "Settings" button in the upper right corner of the game to enter the game settings interface.

3. In the game settings interface, find the "Personal Information" option and click Enter.

4. In the personal information interface, find the "Nickname" option and click Enter.

5. In the nickname editing interface, delete the original blank name and enter the new nickname you want to set.

6. After confirming the modification, exit the game setting interface and re-enter the main interface of the game. You can see that the new nickname you set has taken effect.

It should be noted that the game may refuse to modify or punish your account if your new nickname contains sensitive words or violates the rules of the game. Therefore, when modifying nicknames, it is recommended to abide by the rules of the game and not to use inappropriate remarks or illegal content.