1. First, let's turn on the "National K Song" in our mobile phone. After entering the karaoke interface, click the "My" option at the bottom right.
2. Then enter the personal interface and click the Settings icon at the top left.
3. Finally, you will enter the setting interface. Drag the interface down. Pull down to the bottom to find the option "about national karaoke". Then click "Check New Version" to update.