1. Pigskin removes the hair on the surface, removes fat and oil, and rinses clean
2. Add water to the pot and remove
3. Cut into filaments
4. Wrap the green onion, sliced ginger, star anise, and pepper in the gauze, put it in the pressure cooker with the pig skin, add light soy sauce and a little sugar
5. Select the tendon file to boil
6. Pour into the pot, heat up the juice until the soup is thick, turn off the heat and season with salt
7. Take a clean utensil and pour the cooked soup into the refrigerator overnight
8. Pour out of the vessel
9. Slice, pour in the soy sauce and vinegar juice, sprinkle with chopped green onion
