Marinate the chicken in a mixture of chicken powder, MSG, sugar, white pepper, baking soda, garlic, ginger, sesame oil, Chinese cooking wine, and cornstarch for at least 20 minutes.
Prepare the wet batter by combining cornstarch, self-raising flour, and cold water to form a smooth batter.
Heat vegetable oil in a wok to 350°F and fry the marinated chicken in batches for 6-7 minutes until golden brown and crispy.
In a separate pan, sauté garlic and ginger, then add orange juice, soy sauce, sugar, rice wine vinegar, Chinese cooking wine, chili flakes, and cornstarch to make the sauce.
Toss the fried chicken in the orange sauce until fully coated and simmer for a few minutes.
Serve the orange chicken with a garnish of spring onions and sesame seeds over steamed rice.
