In a small bowl, whisk together orange juice, brown sugar, soy sauce, rice wine vinegar, ginger paste, garlic paste, and chili crisp. Set aside.
In a medium bowl, combine cornstarch, flour, water, egg white, soy sauce, sesame oil, and black pepper. Stir until thick and smooth (it will be slightly stiff). Add chicken pieces and toss to coat evenly.
Heat 2 inches of canola oil in a deep pot to 350°F. Drop chicken pieces in batches, stirring gently so they don’t stick together. Fry for 7–8 minutes, or until golden brown and cooked through. Remove and drain on a wire rack.
Increase oil temperature to 375°F. Return chicken to the oil in batches and fry for another 1½–2 minutes, or until deep golden brown and extra crispy. Drain on the wire rack again.
In a saucepan over medium heat, pour in the prepared sauce. Stir in a slurry made with 1 tbsp cornstarch and 1 tbsp cold water. Cook for 1–2 minutes, until the sauce thickens and becomes glossy.
Add fried chicken to the sauce and toss until fully coated. Serve immediately over steamed white rice with broccoli. Garnish with sesame seeds and green onions.