Soybean, also known as soybean, originated in China, and is cultivated all over China, and also widely cultivated all over the world. Soybean is one of the important food crops in China, which has been cultivated for 5000 years. It was called glutinous rice in ancient times. Mainly produced in the northeast of China, the seeds are rich in protein. Soybean is most commonly used for making various bean products, extracting soybean oil, brewing soy sauce and extracting protein.

Five kinds of grains are commonly known as "grains". There are many sayings about "five grains" in ancient times, and there are two main ones: one refers to rice, millet, millet, wheat and glutinous rice; The other refers to hemp, millet, millet, wheat and glutinous rice. The difference between the two is that the former has rice without hemp, while the latter has hemp without rice. The ancient economic and cultural center was in the Yellow River valley, and the main rice producing area was in the south, while the rice planting in the north was limited, so there was no rice in the original "five grains".

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Soybean not only refers to soybeans, but also includes black beans and mung beans. Soybean is rich in nutrition and content. The content of protein is twice that of pork and 2.5 times that of eggs. The content of protein is not only high, but also of good quality.

The amino acid composition of soybean protein is similar to that of animal protein, in which the proportion of amino acids is close to the needs of human body and easy to digest and absorb. If soybean is eaten with meat and eggs, its nutrition can be comparable to that of eggs and milk, even more than that of eggs and milk.

Soybean fat also has high nutritional value, contains a lot of unsaturated fatty acids, and is easily digested and absorbed by human body. Moreover, soybean fat can prevent the absorption of cholesterol, so soybean is an ideal nutrient for patients with arteriosclerosis.

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