1. First, enter the national karaoke, and click Settings in the upper left corner.

2. in the settings page, find the switching account at the bottom, and click select switching account.

3. Select the account you want to switch, and click Add Account at the bottom, as shown in the figure below.

4. Find a key to create a trumpet, and click and select a key to create a trumpet, as shown in the figure below.

5. Edit and enter the information you want to set, and click Create at the bottom to complete the setting.