This unusual unused postcard hides all its secrets in plain sight.  To start, the card measures 4″ x 7-1/4″.  Our header is the card’s caption, on front and reverse.  But there’s more, in faint letters, and we will put it all here:  “The Latin name of this tree is Morus cathayana Hemsl.  It lives on Guanxin Slope, 1200 meters above sea level, and has witnessed a history of over 700 years.  Greetings from Mt. Emei, a World Heritage site.”   This is an official China Post card and had an uncancelled stamp affixed at point of origin.  All we can suggest is that the Chinese Government should not tell anyone exactly where the tree is.  Grade: 1