Qingdao sweet foam practice: scallions, ginger (to enhance the flavor), a little oil chili. Pour water to boil. Millet noodles beforehand with cool water into soup (do not get too much), poured into the boiling water. Cook to a froth. Add half a spoonful of soda (the key to enhance the flavor), salt, vermicelli, crushed tofu puffs, spinach leaves. It's ready. Drink slowly, do not burn! Perfect with: sweet foam, fritters, fried pies filled with radish, Kadazhou pickled shredded vegetables.