2. Boil the skin (basically stripped of fat oil) in cold water until the water boils, remove the cold water and wash it, and clean the remaining fat oil. (Put ginger, onion, aniseed, pepper and cooking wine in the pot)
3. Cut 400g of processed pigskin into strips or dices, add1100g of water and put it in a container. Drain the water in the pressure cooker and steam it in a container filled with pigskin and water. After pressing the valve, turn the heat down for 45 minutes. After the pressure cooker is deflated, remove the skin with a hood filter. Pour into a fresh-keeping box, add appropriate amount of soup, add salt, chicken essence and white pepper to taste.
4. Put it in the refrigerator for 24 hours. When eating, slice and plate, and use favorite seasoning, especially vinegar.