Why do Xinwen Network anchors have such good memories?

There is a pilot in front, you know. There is a camera on the host's head connected to the pilot, so that the broadcasting studio can see its own manuscript. You didn't pay attention to what they are broadcasting. Are your hands constantly moving during the news? There are subtitles in the news. All the manuscripts in each announcer's hands are placed on the table. There is a projector-like device above the table, which is a camera, and then the host's There is a prompter similar to a monitor on the opposite side. When the host moves his manuscript, these words will appear on the monitor opposite them. This means that they still read according to it, but this time still needs to be spent. They will definitely read it thoroughly before broadcasting. The manuscript is probably based on this principle.