1. Boil the pigskin in a pot.
2. Soak in cold water.
3. Use a knife to remove the excess fat, leaving only the pigskin.
4. Add water to pigskin, green onions, ginger, and a little salt. (Not too much water)
5. Press the tendon button of the electric pressure cooker.
6. Remove the green onions and ginger, pour into a blender and smash.
7. Pour into a bowl.
8. Store in the refrigerator to freeze and cut into pieces. It can be put into a fresh-keeping bag if it is not used up and stored in the refrigerator.
