This a very heavy, very high quality set of 20 large (4″ x 8-1/4″) unused cards inside the cardboard cover shown in our scan.  Honestly, they are spectacular.  Issued by China Post in 2016, each card has pre-printed, coloured 80 fen postage and extensive captions on front and back.  The scenes are identified, and include essentially everything of touristic interest in the Shangri-La district.   You will find Dukezong, wolfsbane flowers, Haba Snow Mountain, Tiger Leaping Gorge, Songzanlin Temple, and many more.  The ultimate Shangri-La souvenir.  Grade: 1