Cooked soybean flour in water is not soy milk.
While soybean flour is ground with soybeans, but the need to fry the soybeans before grinding, and soybean milk is to let the raw soybeans soaked to absorb sufficient water, and then ground into soybean milk, the two in the taste, flavor and nutritional differences.
Soymilk is a favorite drink of the Chinese people and a nutritious food for young and old alike, enjoying the reputation of "plant milk" in Europe and the United States. Soymilk is rich in vegetable protein and phospholipids, but also contains vitamin B1, B2 and niacin. In addition, soy milk also contains iron, calcium and other minerals. Unlike milk in the West, soymilk is very much a Chinese national food, widely popular in the Chinese region.