I remember when I was in primary school, my parents gave me an assignment to do every morning, that is, take a medical salt bottle to the cowshed of the farm to beat milk. In the cowshed, I saw the milkman tie the calf to the cow. As soon as the calf barks, the milkman starts milking. After a while, squeeze out half a bucket of milk and feed it to the calf. The milkman adds water to the milk squeezed into the bucket, which is about a quarter of the milk. After the milk and water are mixed, the children who drink our milk use a special elevator to beat the milk. Generally speaking, when cows eat hay and the like in winter, they produce less milk. At this time, the milk concentration is thicker and the water ratio is higher. In summer, cows eat grass and the like, and the milk yield is high. At this time, the concentration of milk is a little thinner, and the proportion of water is even lower. After this kind of milk was brought home to boil, a thick layer of milk skin (cream) appeared on the surface of the milk a few minutes later. At that time, I was not very interested in milk, but I was much more interested in milk skins than drinking milk. After I came to work, my parents retired from the pastoral area and returned to the county town in the agricultural area. They can't change the habit of drinking milk tea and still order milk every day. However, I always encounter the problem of canceling the order before long, because the quality of the milk is ok when I try to order it, and the quality of the milk is getting worse every day after you order it. Water is essential, but the key problem is that this kind of milk still looks very thick, but it is difficult to find the thick milk skin after cooking. I wonder what the dairy farmers added besides water. If the milk list can last for more than half a year, even a dairy farmer is a conscientious person, and he will not add anything except reasonable water. A few years ago, I went to a friend's house in a pastoral area. My friend said that I ordered some Tibetan yogurt, so let me try it. Yogurt is put in a small pot. At first glance, it looks like caked tofu. My friend said that you can't add water to milk when making yogurt, so the real yogurt is so thick that you can't eat it without adding a lot of sugar. It is too sour. Come to think of it, some people often drink yogurt when they hear that yogurt can lose weight. As a result, the more they drink, the fatter they get. But it is difficult to import yogurt to lose weight. Look at the yogurt we bought in the supermarket. With some stabilizers, thickeners, sugar and the like, it is still thin and feels like thick milk. In fact, the reason behind this milk incident is very complicated, which can't be explained clearly in one sentence. It is impossible for us outsiders to have an insight into everything. I don't know when the phrase "a glass of milk a day makes China people strong" (of course, they mean milk) began to get louder and louder, not from government departments, but from enterprises, which began to build a milk market in China and cultivate the habit of drinking milk in China. Some manufacturers engage in free milk delivery activities (although this activity is very commercial, it objectively does a good thing for children in need), and some manufacturers use the most advanced production equipment, but few manufacturers raise cattle, and the task of raising cattle is given to farmers. Just like an advertising label winery in Shandong more than ten years ago, people who went to the winery said that a winery with an annual output of tens of thousands of tons had no fermentor, because the winery imported cheap raw wine from Sichuan and produced "high-grade" liquor after a simple brother-in-law, with an output value of several hundred million. This is the "secret" of the rapid growth of that winery in Shandong. Unfortunately, the dairy industry in China is now repeating the development track of Shandong wine industry, and more and more enterprises are just blindly expanding production. It is hard to imagine what it means for a dairy company not to have its own dairy factory if the source process of milk production is separated from the production process. Of course, after making the cakes in China milk market bigger, the biggest problem faced by manufacturers is to find so many pastures and so many feeds there ... The rapid development of cattle industry is actually a serious environmental problem. On the grassland, horses, cattle, sheep, rabbits and rats are the biggest enemies of grassland degradation. In the choice of cattle and sheep, cattle do far more harm to grassland than sheep. Although both cattle and sheep are ruminants, the harmful gas (methane) produced during rumination has been recognized as one of the culprits of global greenhouse effect. This is a typical problem facing the development of China. Without the development of this industry, similar problems will occur, but after the development of this industry, it may cause greater environmental problems. This is true in the automobile industry, especially in the dairy industry. Actually. We should correctly understand the meaning of the sentence "A glass of milk a day makes China strong". This cup of milk refers not only to milk, but also to animal milk, but to animal and plant milk. The plant milk mentioned here, which is what we are most familiar with, such as soybean milk, is different from the westerners who eat meat because of ethnic reasons. One-third of China people can't digest milk (if your stomach swells after drinking milk, it's usually because your body lacks enzymes to digest milk). So don't let these dairy manufacturers use these slogans to fool the people. We should consume milk rationally. If you can drink milk, you should drink it. If you can't drink it, don't be sad. Soymilk is drinkable. Think about it from another angle. Drinking one more glass of milk may contribute to the better development of an industry, but it may also cause more serious land resources and environmental pollution.