I remember watching a magic trick on CCTV before. A magician put three cards in front of the camera. First, he opens them for you to remember, and then he buckles them for you to remember.

Jay Chou also achieved this magic in Hunan Satellite TV. The effect is: Jay randomly finds five cards from a light deck of playing cards and puts them on the table. Jay first lets you remember any of these five cards in your mind, and then tells you: I'm going to count the cards by hand later. No matter which one of these five cards is counted, you have to add the initial number from the card you remember (of course, you count it in your mind), for example. In short, start with the cards you remember. When you count to twenty, you will be surprised to find that the card he ordered is exactly the card you remember in your heart! I watched the replay and recorded another card. It turned out that he only clicked the card I recorded when I counted to twenty! And this kind of magic is not limited to the number of people, everyone can join, and the result is always the same! I've been thinking hard for a day, and finally understand: in fact, the general trick of magic is how to count cards by yourself: you never know what others have remembered, so you can count cards by this method: there must be non-repeating big and small cards, counting backwards from the 19th, and every card you order must be consistent with the countdown in your heart (of course, 19th to 14th are not in poker) to achieve that effect! Find someone to try! What you say about magic seems to be that magicians always turn over a card you remember. His flop will not change, will it? You remembered another card when watching the replay, but he still turned it over, but the replay is the same as the live broadcast, so unless he is a god, he can only do so! There seems to be something wrong with your description. Look at it.