Canning has long been a controversial product in China. Many people question the large amount of preservatives in cans, so they almost never eat them. However, canned food can be seen everywhere in Chinese People's Daily life, such as on the dinner table during the Spring Festival and in the birthday banquet of the elderly. In the eyes of those born in the 1970s and 1980s, canned food is a delicacy only given to them by their parents when they were sick when they were young. However, in the eyes of modern people, canned food is synonymous with preservatives. Today, the brilliant food factory will take you through the clouds to see the essence, tell you what the real can is.

In Napoleon's time, there were already the earliest forms of cans. In order to ensure the supply of troops, Napoleon ordered the development of a long-term non-spoilage food method. After the slow improvement of later generations, today's canned food came into being. In addition, the mouth of the bottle is sealed well to prevent the entry of bacteria. In this way, cans can be kept for a long time without preservatives, so they are preservative-free.

The world's longest-lasting can

Experts are said to have discovered cans from the Second World War in an underground warehouse. Records show they were produced in 1944, nearly 80 years ago. Since the cans were still in good condition in the warehouse, the experts reheated the cans and found that the food still looked surprisingly fresh. So the expert took a few samples sent to the laboratory for testing. After the physical and chemical properties of the food, the food in these cans is also intact, very normal.