because the official has not provided pre-installed software resources to download at present, if the software of the current equipment has been uninstalled or lost, it cannot be directly repaired and restored. It is suggested that the music store can download third-party software to cooperate with it.

if you don't want to try to use the third-party replacement software and want to restore the previous pre-installed software, you need to brush it. Because there are certain risks in self-brushing, the failure of brushing will affect the warranty of the equipment. It is suggested that you can brush the machine at the local maintenance site.