How does Huawei nova2s mobile phone blur the background? How to shoot professionally?

First, turn on the camera and turn on the large aperture mode, and a prompt "Large aperture is on" will appear on the screen. Click the viewfinder to select the focus of the photo. After focusing, click and slide the small white dot next to the focusing ring up and down to select the aperture size. The adjustment value represents the current aperture value.

Secondly, click the icon in the yellow box and a slider bar will appear. Sliding to the left will increase the aperture and sliding to the right will decrease the aperture. Note that the smaller the value, the larger the aperture and the smaller the value.

Third, large aperture shooting can generally be understood as shooting with an aperture of more than 2.8, and adjusting the aperture value to the state you want to shoot. When shooting, you can click the position of the subject by hand to focus, and then press the shooting button to complete the shooting.