2. Fold two pieces of white paper or cards together to form a small pocket.
3. Insert the small pocket into the middle of the playing card to make it overlap with spades 13.
Take out a coin and put it on the top of the playing card.
5. At the beginning of the performance, first show the coins at the top of the playing cards and ask the audience to confirm.
6. Next, pick up the playing cards and turn them over. At this point, the coin should "disappear".
7. Then, flip the playing card again and tear a gap from the center to expose the small pocket.
8. Take out the small pocket and take out the coins hidden inside.
9. Finally, close the pocket, reinsert it in the middle of the playing cards, and then merge the gaps, and the whole deck of playing cards will be restored.