1. Put the ribs into the pot and filter them with boiling water, wash them well and set aside.
2. Put the ribs in a pressure cooker, add ginger slices, and simmer for 20 minutes
3. Open and put in pig skin, yuba simmer for 10 minutes
4. Add a spoonful of salt and mix well
5. Cut the chopped green onion and sprinkle into the noodle soup.
