It is prohibited by background settings or turned off by assistant software. \x0d\ Functional software similar to "Mobile Phone Acceleration" adds QQ Music to the "Protected Background Application". Function names may be different in some software. \x0d\ Allow the background running option in the phone settings. If you choose to disable it, the phone will automatically close the program when exiting or minimizing the program. \x0d\1. You can try clearing the running memory or restarting the machine. \x0d\2. You can make the following changes in the phone settings: \x0d\ Settings - Protected background applications (different phone models have different names) - —Mobile QQ Music—protected.