How did two identical people appear on TV at the same time?

Generally, two people come out of the same picture in TV series, only one person can see the front face, and the other person may be body double.

The way to have two people at the same time:

1, body double. At this time, only one person's face can be seen, and the other is a double body, with a figure similar to his.

2. Synthetic special effects. This method is of little use, especially for films with a small budget. It is rare for two identical people to appear in a shot at the same time in this way.

3. edit. There are many such films. This method is that the same actor takes two sets of shoulder shots respectively, and then edits them.

4. Twin actors. This is also one of the few methods. First of all, twin actors need certain opportunities. In addition, its shortcoming is that the director does not grasp the control of the actors in the play. If the actor's play is not good, it will have a very bad shooting effect.