Holographic projection technology is relatively mature. When using a projector for projection, a holographic film with a transparency of 75% -80% is used. When shooting a film, a green or blue background is used to extract the image, and the background is filled in black. After post production synthesis, the holographic feeling can be achieved. An induction system can also be installed, which triggers the corresponding hardcore playback when a person enters a certain area, realizing the triggering of virtual welcome and making it more realistic.