Place the pork, 4 ginger slices, knotted scallion bundle and splash of Shaoxing wine in a pot of cold water, covered, and bring to a boil over low-medium heat. Once boiling, remove the lid and continue simmering 3 minutes on low heat, skimming and discarding the foam. Strain the blanched ribs with a slotted spoon and rinse clean in warm water, scrubbing off any scum. Set aside and let dry before pan-frying in next step.