Add it in settings.

Open National Karaoke, click on mine, then go to your homepage, click on the settings above the avatar, which is the circle like a small gear, then click on your avatar, and after entering, you will have a nickname. You can add the family logo in front of your name. If there are any special symbols, you can go to the input method and slowly look for them. Basically, they are all available and can be operated on your mobile phone.