Combine chicken wings, black pepper, white pepper, garlic powder, salt, sugar, soy sauce, Shaoxing wine, sesame oil, and egg in a large mixing bowl. Mix everything until the wings are well-coated. Next, add the cornstarch and all purpose flour and mix again until the chicken is coated.
10 chicken wings, 1/8 tsp black pepper, 1/4 tsp white pepper, 1/4 tsp garlic powder, 1 tsp kosher salt, 1/2 tsp white sugar, 1 tbsp soy sauce, 1 tbsp Shaoxing wine, 1 tsp sesame oil, 1 egg, 1 1/2 tbsp cornstarch, 3 tbsp all-purpose flour