Making Soy Milk, Tofu, and Douhua
The "Field Learn" Soybean Trilogy: First, domestic soybeans are soaked to allow them to expand and soften. Next, they are sent to a grinder to be crushed and separated into soy milk. The raw soy milk is then pumped into a heating tank, where it is cooked under high temperature and pressure to remove the "beany" smell, resulting in rich and delicious cooked soy milk.
Part of the cooked soy milk is cooled and bottled to become the soy milk we usually drink. Another part undergoes further coagulation and pressing to be made into douhua (tofu pudding), tofu, or dried tofu. By adjusting the pressure and time, the texture and water content of different soy products can be controlled. Douhua is finished once it coagulates, as the focus is on retaining moisture. In contrast, tofu requires draining the water and reshaping, so the manufacturing process and pressing methods are different.