Gluten is a kind of protein, which consists of wheat gum protein and wheat grain protein. Add a proper amount of water and a little salt to the flour, stir well to form dough, and then rub it repeatedly with clear water to wash off all the starch and other impurities in the dough, leaving gluten. Oil gluten is made into a ball by hand, fried in a hot oil pan until golden brown, and then taken out. Put the washed gluten into a boiling pot and cook it for 80 minutes until it is cooked, that is, "water gluten".