Preheat a 5- or 6-quart air fryer to 350°F for 3 minutes.
Pat the pork dry with a paper towel.
Combine half of the salt flakes with the Chinese five spice powder, then rub this mixture into the pork rind.
Carefully pull out the air-fryer pan and basket, place the pork in the basket, and give it a light spray with cooking spray.
Slide the pan and basket back into the appliance.
Reset the temperature to 400°F and set the timer for 25 minutes.
Cook until the pork skin crackles.
Reset the temperature to 325°F and set the timer for 30 minutes.
Continue cooking until the pork is tender or an internal temperature of 158–167°F is reached on a meat thermometer.
If the pork is overbrowning, cover it with foil.
While the pork is cooking, make the Ginger Dressing by whisking together the lemongrass, ginger, soy sauce, lime juice, sesame oil, rice wine vinegar, and white sugar in a small bowl.
Arrange the cucumber, red onion, Napa cabbage, herbs, spinach, and chiles in layers on a platter.
Once the pork is done, slice it thickly and place the slices on top of the salad.
Scatter the green onion over the pork and drizzle the ginger dressing.
Serve the dish with lime wedges.
Notes / Tips / Wine Advice:
To achieve the best crackling, ask your butcher to score the pork rind for you. As soon as you get home, place the pork on a tray, uncovered, in the fridge for up to 2 days to dry the rind out. This will assist with achieving perfect crackling.