01 - Combine chicken with soy sauce, Shaoxing wine, cornstarch, and black pepper in a bowl. Mix thoroughly and let marinate for 15 minutes.
02 - Whisk together all sauce ingredients (black vinegar, light soy sauce, sugar, cornstarch, water, and sesame oil) in a separate bowl until smooth. Set aside.
03 - Heat 1½ tbsp oil in a large skillet or wok over medium-high heat. Add eggplant cubes and stir-fry until golden and tender, about 5–7 minutes. Transfer to a plate.
04 - Add remaining oil to the skillet. Add marinated chicken and stir-fry until browned and nearly cooked through, about 4–5 minutes.
05 - Add garlic, ginger, and white parts of scallions to the skillet. Stir-fry for 1 minute until fragrant.
06 - Add red and yellow bell peppers. Cook for 2–3 minutes until slightly tender but still crisp.
07 - Return cooked eggplant to the wok. Stir to combine all ingredients.
08 - Pour in the prepared sauce. Stir-fry everything together for 2–3 minutes, or until the sauce thickens and evenly coats all ingredients.
09 - Sprinkle with green parts of scallions. Serve immediately with steamed jasmine or brown rice.