This is another of those PRC philatelic items that presents a real challenge to describe.  We will keep it short.  To start, these are four unused Year of the Snake government lottery cards.  Our scan shows the front of one card and the back of another.  The postage is pre-printed.  The four cards are encased in a complicated folding cover, meant for display.  On the cover, in Chinese only, the title is “Dunhuang Lucky Snake” … the cards were “Authorized by Dunhuang Paiting Academy” and we should point out that Dunhuang is a city in China’s northwestern Gansu Province, on the edge of the Gobi Desert. Once a frontier garrison on the Silk Road, it’s known today for the Mogao Caves.  Why Dunhuang got the commission for these cards, we’re not sure.  Grade: 1