Flour. Flour is a kind of powder ground from wheat, is one of the main ingredients of most baked goods, in the production of fried pig's feet ring, you need to mix the flour with the right amount of water, make a thick paste, and then pour it into the pig's feet ring, so that the pig's feet ring is evenly coated with flour, and then finally deep-fried, so that fried pig's feet ring will be more crunchy and delicious.