Turn on Douyin auto-startup Douyin is not auto-startup and cannot run in the background. Go to phone settings-applications-Douyin and turn on Douyin's auto-startup.

2.

Set battery not to be optimized. The phone is set to battery optimization, and Douyin is not running in the background. Go to settings, special application permissions-battery optimization, and set it to not to be optimized.

3.

Clean up the phone's memory. The phone's memory is insufficient. Clean up the phone's memory.