Cut the rib strips into individual riblets if not already done (centered between each bone)
Bring a pot of salted water to boil, add riblets and cook for 5 minutes then drain and rinse.
While the ribs are boiling, prepare the sauce
Add the black vinegar, rice vinegar, shaoxing wine, light Soy Sauce, Dark Soy Sauce and orange juice to a small bowl and set aside.
Turn the Instant pot on to sauté and when hot add the 6 Tbsp of white sugar evenly to the bottom and let it melt until it turns the color of maple syrup (dark golden brown), but don't let it scorch or burn. Don't touch it, just let it go.
Once the sugar has reached the desired color, add the ribs, sauce, green onions (white part only) and ginger slices to the Instant pot and put the lid on and lock, making sure the vent is set to seal (not vent) and change the cook setting to pressure cook and set for 8 minutes. Once the timer has gone, let the pot natural release for 18 minutes, then open the vent to release the remaining pressure.
Open the lid and set aside, remove ginger slices and green onions (discard).
Turn the Instant Pot back to the sauté function and reduce the sauce. It will boil, stir occasionally until the sauce is glossy and thick and coats the riblets. Do not let it completely reduce or scorch. This can take up to 15 minutes so don't worry if it seems to be taking some time to thicken, it will get there. There will be some sauce remaining, that's good!
Serve the ribs plain or over rice and drizzle with the remaining sauce. Garnish with sesame seeds and green onions (green parts only) and Enjoy!