1. Observe whether the printing quality and color on the package are clear and bright, and whether there are obvious flat-fell seam marks or damage.

2. I have bought many new Xiaomabao cards, and I remember the cards I issued each time. You can also judge whether there is an sc card by observing the pattern and color of the card on the package.

3. These methods are only preliminary judgments. Finally, you have to open the card package to determine whether there is a good card in it.