Food resources are limited, and long-term excessive demand and waste will eventually lead to no food to eat. This work concretely takes food resources as ears of grain, and endless demand will eventually make ears of grain no longer produce food. It is shameful for people who want to wake up to excessive demand and waste food to waste food. They should take it with degree and frugality. Advocate the whole society to practice economy and be the practitioner and advocate of the "CD-ROM operation.