The photographic exposure is too strong.

If the photographic flash is too bright, the large aperture will be overexposed. You can appropriately narrow the aperture, or adjust the flash intensity of the flash, or add a soft cover in front of the flash, or the flash should not directly hit the subject, hit the white wall and other objects, and shoot with reflection, or put the flash away and turn off the flash. Anyway, there are many ways to deal with it according to the specific situation at that time.

I hope to adopt.