It's best not to drink cans of beer after expiration, because after expiration, not only the original flavor disappears, but also bacteria will breed and bacteria may produce toxic substances. Food poisoning may occur after drinking expired beer, and beer should be discarded after expiration.

Beer is the oldest alcoholic beverage of mankind and the third largest beverage in the world after water and tea. Beer was introduced to China in the early 20th century, and it is an imported wine. Beer is translated into Chinese "beer" according to English beer, which is called "beer" and is still in use today. Beer is a low-alcohol wine rich in carbon dioxide, which is made of barley malt, hops and water by yeast fermentation.