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The world wastes $400 billion a year in food, while many people are starving. ‘n% off food' Refrigerator effectively alleviate the problem. Wasted food in restaurants and convenience stores can be sold at discounted prices to workers who have no time to cook, and consumers can clearly check the freshness of the food, the discount and the date of production to choose the healthy food they need. We will donate 10% of our profits to people who need food. The refrigerator is scattered in residential areas, businesses and other locations, which will greatly reduce food waste.