The Grain Coupon: During the period of Culture Revolution in 1960s and 1970s in China, a disable old man wanted to use his handicraft, a snuff bottle with inside painting, for the exchange of “Grain Coupon” from a soldier. The soldier promised to give more coupons if the old man can forge a precious stamp. The old man had to do it, however, he failed and fell out with the soldier. At the end, the old man got grain in another way.