In a mixing bowl, combine the all-purpose flour, cornflour, salt, and black pepper. Whisk together until blended. Coat chicken pieces in the flour mixture.

Pour oil into a skillet until about 1/2 inch deep and heat to 350°F (175°C).

Fry the coated chicken in batches for about 4-5 minutes or until golden brown. Transfer to paper towels to drain.

In a saucepan over medium heat, combine orange juice, soy sauce, sugar, rice vinegar, minced garlic, and ginger paste. Simmer for 5-7 minutes until thickened.

Add fried chicken pieces to the sauce, tossing until well-coated.

Serve on a platter, garnished with green onions and sesame seeds. Enjoy with steamed jasmine rice.