There are many magic tricks combining coins and cards, but most of them need to be completed by means of techniques, and hollow coin does not need any techniques, you can complete the combination of the two very magical magic effects.
N2G innovatively combines the round holes and hollow parts on ancient Chinese coins, making card marks appear without losing rationality, giving everyone more performance space.
The large size of the hard hollow can also allow people to make burn predictions on more body parts.
More effects waiting for everyone to develop.