In the 4th century AD, beer spread all over northern Europe. The types of beer began to become rich, among which mead brewed by British people with honey and water is the famous beer. A kind of dark beer is also famous in Britain, similar to modern dark beer. In the 1 century, the Irish themselves brewed a beer similar to modern light beer.

Beer was introduced to China in the early 20th century and belongs to foreign wine. Beer is based on English. Beer is translated into Chinese beer, called beer, which is still in use today. Beer is barley malt _ hops _ water is the main raw material _ low-alcohol wine full of carbon dioxide is brewed by yeast fermentation. Most international beers add auxiliary materials. Some countries stipulate that the total amount of auxiliary raw materials should not exceed 50% of malt. In Germany, except for exporting beer, beer sold in Germany does not use auxiliary raw materials.

The degree of beer is mostly 7 to 12 degrees, and the degree of beer is not the degree of liquor. The degree of beer refers to the concentration of wort. Generally speaking, the concentration of wort is related to the alcohol content of beer. Beer can be drunk in moderation, which is also good for the human body. It can relieve summer heat, promote digestion, enhance appetite and is rich in nutrition. It can also protect human bones. But don't drink too much. It is best not to drink alcohol after sweating, not to drink alcohol, not to send medicine with beer, and not to drink beer after exercise.

According to the original wort concentration, there are low concentration, medium concentration and high concentration beer. The original wort concentration of low concentration beer is 8, and the alcohol content is about 2. This kind of beer has less materials, low cost and poor stability, and is suitable for cold drinks. The original wort concentration of medium-strong beer is 10%~ 12%, and the alcohol content is 2.9 ~ 3.7. This kind of beer has good stability and can be stored for a long time after sterilization. It is a bulk product in beer.

The original wort concentration of high-concentration beer is 14%~ 18%, and the alcohol concentration is 4% ~% 4.5. This beer has good stability, moderate solid concentration, mellow taste and storage resistance. German beer has a high alcohol concentration, about 5-9%, which is bitter.

Beer is made of malt and barley malt as main raw materials, adding hops, liquid gelatinization and saccharification, and then liquid fermentation. It has low alcohol content, less carbon dioxide and rich nutrition. It contains a variety of amino acids, vitamins, low molecular weight sugars, inorganic salts and enzymes, and is easily absorbed and utilized by the human body.

Beer degree is divided into three categories:

High concentration type: the wort concentration is 14 to 20. The beer has long production cycle and good stability, and is suitable for storage and long-distance transportation.

Medium concentration type: the wort concentration is 10 to 12, 12 degrees, which is the main variety of beer production in China.

Low concentration type: wort concentration is 6-8, which can be made into cold drinks in summer, but its disadvantages are poor stability and short storage time.