Cam is just an ordinary card, which is useless. But for girls in idolize, especially fans who like to collect idol cards, a small card is printed with photos of their favorite idols, so the card will never change in their eyes.
If you buy an album card or peripheral card, of course, it is on the table. It is best to be happy when you see it every day, but if it is not an official peripheral card, you can write it on the back as a greeting card. Self-made cards, auxiliary cards, publicity cards and star photo cards are used to promote their favorite idols.