Open the selfie interface first, and then open the "three points" setting option.

Click the flash option to turn it off; If there is a slash on the flash icon in the red box, it means the closing is successful, if there is no slash, it means the closing is unsuccessful.

In some dim scenes, the camera will automatically increase the sensitivity and automatically give the appropriate aperture and shutter combination, and even turn on the flash to make it expose normally. And gives people a feeling that they can automatically brighten.