In 1809, the world trade was prosperous. Seamen who lived on ships for a long time fell ill because they could not eat fresh vegetables, fruits and other foods, and some suffered from severe life-threatening scurvy. So France used a huge prize of 12,000 francs to ask for a way to store food for a long time. Many people have invested in research activities in order to win awards. Among them, the Frenchman Appel and his wife, who are engaged in candied food, devoted all their energy to continuous research and practice, and finally found a good way: put the food into a wide-mouth glass bottle, plug the bottle with a cork, and heat it in a steamer , and then plug the cork tightly and seal it with wax. In this way, the early cans appeared. The Abels were rewarded by France and warmly welcomed by the seafarers.