From Guangdong Philatelic in 2013, this is a folio measuring 7-1/4″ x 10-1/4″.  Open it up to see, on the left, text (Chinese only) and one mint stamp in a small sleeve.  On the right, also in a sleeve, is a postcard almost identical in design to the cover but without the words; and on the back of the postcard, the same stamp that is also on the left–but no postmark.  China goes Green!    Grade: 1