What is tofu that the northeast people say?

Water tofu is tofu, which is made of soybeans. Soak soybeans, grind the beans into powder with a small mill, filter out the dregs in the beans, put them in a pot to boil, stir them evenly with a proper amount of salt water, then put a cloth with good air permeability into a square wood, wrap it in it, flatten it, and cut it into pieces with a tofu cutter. This is tofu. I briefly talked about the making process of tofu.