How did the Kpop card come from?

A small card refers to a small card with a photo of a star randomly given in an album. Small card is a kind of star surrounding, which is used for fan collection.

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. Fans sometimes make small cards, supplementary cards, promotional cards, star photo cards and so on to promote their favorite idols.