Place chicken pieces in a mixing bowl and combine with salt, white pepper, soy sauce, shaoxing wine, grated garlic and ginger, sesame oil, and egg white. Stir the mixture thoroughly and let it marinate for at least 15 minutes.
In a separate small bowl, blend the light soy sauce, orange juice, orange zest, chicken stock, brown sugar, and cornstarch. Whisk until the brown sugar and cornstarch dissolve completely and set this sauce aside.
Spread potato starch evenly on a baking sheet or plate. Toss the marinated chicken in the potato starch to coat well, shaking off any extra starch. Spray the air fryer basket with oil spray, arrange the chicken in a single layer, spray the top of the chicken with oil spray, and cook in the air fryer at 350°F for 10 minutes.
After 10 minutes, turn the chicken pieces over, spray the other side with oil spray, then air fry again at 400°F for 8 minutes or until the chicken reaches an internal temperature of 165°F and has a crispy texture.
Heat 2 tablespoons of neutral oil in a large pan or wok over high heat. Add the minced garlic and ginger, stirring for about 15 seconds until fragrant.
Pour the prepared sauce into the hot pan and continuously stir until it thickens, about 1 to 2 minutes. Add the vinegar and stir through to combine.
Return the cooked chicken to the pan and toss everything together until the chicken pieces are thoroughly coated with the sauce. Finish by drizzling in a teaspoon of sesame oil.
Serve immediately with rice and enjoy your crispy and flavorful Air Fryer Orange Chicken!