The upper half of the photo you see shows one of the four cards in this set.  The bottom half shows the wrapper the cards normally live in.  Each card has a different musician, identified as Ma Sicong, He Luting, Liu Tianhua, and Xiao Youmei.  That large red area says “extreme postcard”, which we think is the same intention as “maximum cards”.   Issued in 2012 by China Post.  Grade: 1