I want to ask the photographer to answer! How does this light work in portrait photography? It doesn't seem to be the traditional way to play. (There are pictures in it)

Portrait photography needs at least three kinds of lights (more can be added according to the needs of the scene): main light, auxiliary light and background light.

Judging from the photos you provided:

Its main light is relatively close, and its forehead has obvious illumination, which is arranged on the left side.

The auxiliary light is in the middle of the right side, mainly for wide-angle illumination, which makes the red clothes glow evenly and avoids the contrast of the clothes caused by the intensity of the main light.

The background light is on the back curtain (seamless paper) and is evenly illuminated by the floodlight. This set of light plays well in this photo and is very uniform in the background. Probably not lights, but a group of lights, arranged behind the characters, adjusted to make them even.

Main lamp, auxiliary lamp and umbrella lamp can be used, wherein the background lamp can be composed of a plurality of light bulbs.