What is the reason why OPPO phones light up their own screens?

Oppo phones light up their own screens for the following reasons:

QQ software, SMS, and third-party software turn on the flip switch and the phone lights up.

Solution: Just close the pop-up window of the above software.

Example of WeChat closing method:

Step 1: Open WeChat on the mobile phone's main screen.

Step 2: Click "I" in the lower right corner.

Step 3: Click the "Settings" button.

Step 4: Click "New Message Reminder" after entering the settings.

Step 5: Click to close "Accept new message notification"