Open the JD.com mobile app, click "My" (on the far right of the bottom row), and there is a settings button at the top of the interface. Click it and you will find a brightness adjustment. Click on the JD.com page, then press the menu button on the phone. There is a brightness adjustment in the second row. Select automatic adjustment. The screen brightness dims when opening the software. Reason: Since the system brightness adjustment permission is open to third-party applications, some applications (such as readers, etc.) can control the brightness. The brightness may change when exiting or entering these applications