What should I do if Xiaomi 9 is seriously stuck?

If your mobile phone is stuck in use and the speed is slow, I suggest you:

1. Uninstall the optimized, power-saving and safe third-party software in the mobile phone, and close the self-startup items that are not commonly used;

2. It is recommended that you use it in an environment with moderate temperature. Too high or too low temperature will affect the use of mobile phones;

3. Confirm whether there are too many software residing in the background. For uncommon software, you can select the corresponding software in Settings-Application Settings-Application Management, and modify the power saving policy to "Shut down after running in the background for more than 10 minutes" or "Stop running in the background";

4. Turn off the animation effect to reduce the jam: Settings-My device-All parameters-Click the MIUI version 7 times in a row, and then go to Settings-More Settings-Developer Options-Window animation scaling, transition window animation scaling and animation program duration adjustment are all turned off (the visual fluency effect will be reduced);

5. If the above methods are ineffective, it is recommended that you back up the data and resume the factory attempt.