The first is triangle composition. In other words, the three corners are where the heads of three people are located. Usually a right triangle. For example, a family of three is lying on the grass, head to head, and the photographer is leaning down.

In a word, there is no definite law. It is nice to be able to shoot a picture of a harmonious and happy family of three.

Empty a table and find a piece of white paper or yellow paper to spread under it. Put the bag on it and shoot it. Don't turn on the flash of the camera, use a daylight desk lamp to fill the light on the side, which will give a more shiny or crystal clear feeling.