1. Prepare materials.
2. Put the pork shoulder and ginger skin in a pot of water, add water to boil, and skim the foam.
3. Cut the washed pork shoulder into small cubes and prepare the green onion and ginger.
4. Add oil in a hot pan, add green onion and ginger until fragrant.
5. Stir-fry the pork.
6. Add a spoonful of sugar and slowly fry to color.
7. Add a bottle of cooking wine with a cap.
8. Add light soy sauce and dark soy sauce, and add water to cover the meat after coloring.
9. Move the ingredients in the wok to the electric pressure cooker and cook for 15 minutes.
10. At this time, peel the potatoes and cut into pieces, soak them in water.
11. Add the potatoes to the electric pressure cooker and cook with the meat for 5 minutes.
12. After opening the lid, add salt to taste.
