How did you get the effect of this photo? I use Nikon D90 SLR, please give me the specific steps.

This is a shaking shot, also known as a chasing shot. Swing is a slow-motion photography technique, which can blur the background by tracking the camera at almost the same speed as the target scene to enhance the effect of the target. The lateral follow-up swing can show a strong sense of speed, while the longitudinal follow-up swing is generally used to show a sense of burning or explosion.

The shutter speed is about 1/20 to 1/80, depending on your shooting situation. I think the shutter of your picture should be around 1/30. Pay attention to the fact that the focus must be on the car, and then the shutter will take precedence ~