In a bowl, add orange juice, soy sauce, brown sugar, hoisin sauce, rice vinegar, sesame oil and chili oil; whisk well.
Place chicken pieces in a bowl and add 2 tbsp. sauce. Stir well before seasoning with sea salt and freshly ground black pepper; stir again. Marinate the meat for 30 minutes.
Half an hour later, dredge the chicken pieces with cornstarch until well coated and set aside.
In a Dutch oven over medium high heat, add oil and when the temperature reaches 385ºF/196ºC, working in batches, carefully add the chicken pieces. Fry them for 5 minutes or until golden brown. Using a spider strainer, transfer the fried pieces to a plate lined with paper towels to absorb any excess oil.
To finish the sauce; in a large saucepan or wok over medium heat, add oil and when it gets hot, add green onions (white parts) and dried red chilies; sauté for only 1 minute.
Add ginger and garlic and sauté for 30 seconds. Pour in the sauce and stir well before adding the chicken broth mixed with 1 tbsp. cornstarch. Stir until the sauce thickens, about 45 seconds.
Add fried chicken pieces and stir to coat, heating them through quickly - don't leave them too long otherwise they'll lose their crispiness.
Serve over white rice and garnish with green onions (green parts) and sesame seeds.