Guess the magic of things, what is going on?

I can't see you performing. Judging from your description, this trick is probably like this.

The performer can't see what you choose, so you can only rely on a person around you and a holder who can see what you choose to send a signal.

For example. He put seven or eight things on the wine table, such as wine glasses and cigarette paper. They have already colluded with the code words, such as touching chin for wine glasses, scratching hair for cigarettes, fiddling with nails for toilet paper, and so on. It can also be a more subtle code, and no one can find it except the executor and the holder.

There is no telepathy in the world, and all magic is scientific.