This is a heavy, unused, unique item issued by China Post.  First, it measures about 8-3/8″ long, by 4-7/8″ high, by 5/8″ deep.   Translucent plastic encloses two things:  (1) a book (entirely in Chinese) including several pages of postcards with stamps pre-printed and also alongside the cards, making them look like admission tickets to various amusement or scenic venues; also some advertising (!) and what might be a phone card, though we’re not sure; and (2) another similar but somewhat larger book doing much the same thing.  We have not seen anything like this before.  But it looks like it would get you into almost anything of interest in the entire Guangdong Province, and postcards are at the heart of it all.  Magnificent!  Grade: 1.