What does the so-called double body mean in the eight characters?

Style: body double in Xi style. In order to speed up the shooting progress, Group A and Group B often shoot at the same time, and Wen Wei shoots panoramic or background scenes. Martial arts: double body, martial arts drama, mainly shooting some martial arts scenes that ordinary actors can't complete, and it is a difficult action. Light body double: The polished body body double. Some shots need to be shot at high altitude with the camera on the elevator frame, and it takes a lot of time to adjust the position. Of course, the main actor didn't have time to wait for the light, so body double sat motionless in the actor's position, waiting for the high-speed light in the position.