Food tickets themselves are worthless tickets, but they can buy grain at the national price. In fact, food tickets have become a kind of marketable securities. The face value of the grain ticket is equal to the difference between the national price and the market price. Since 1993, China has abolished the use of food stamps. Food stamps have quickly entered the ranks of collectibles, and the number of "food" collectors in China has been expanding. In the past two years, in Hong Kong, Macao Special Administrative Region and some European and American countries, high-priced purchases have competed to collect the treasures of Chinese grain tickets. With the passage of time and the warming of grain gathering fever, the grain ticket collection market will also rise. As long as we grasp the basic principles of collecting food stamps, the prospects of investing in collecting food stamps will be considerable. As the second "currency" of China, food stamps have lasted 40 years in China. It reflects the social and economic conditions of various historical periods in China, and has more important research value and collection value.