Unrecognizable

At this moment, the other person who was watching the show on the side was also stunned and looked at the white card.
There was nothing on the card, just a simple pure white card, and even the magnetic stripe seemed to be made white for the sake of beauty.
This will result in people thinking at first glance that it is just a card, and an ordinary card with nothing printed on it.
Even the cashier was stunned for a moment. He didn't expect this guy to hand him such a thing, so he raised...