The large Chinese text in blue at the bottom translates to “Idol Activities”.  This scan shows the front cover of an unopened set of 180 items, consisting of 30 larger postcards, 30 smaller ones, and 120 stickers.  We are not certain, and can offer no guarantees, about how the smaller cards relate to the larger ones, but our scan 40400064B shows the back cover and would give you the same idea we have.  Grade: 1