How did you get the aperture in the picture? It's different from the reflection in the water. . . It's a photography skill, right, P?

The camera is fixed and exposed for a long time (estimated at least 5 minutes).

The model holds a spotlight (possibly a laser) in her hand and turns her arm as she walks. These circles are the tracks of light.

The light band on the ground is the track drawn by the light shining on the ground.

Because the spotlight has a lampshade, depending on the hand-held angle, the camera may not take light when turning left, which is why only half of the first three laps are taken.

In fact, the aperture in the water, like the above, is a general reflection, only disturbed by water waves.