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 Chinese black vinegar, light soy sauce, sugar, cornstarch, water, and toasted 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 pieces 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, approximately 4–5 minutes.
05 - Add garlic, ginger, and white parts of the scallions to the skillet. Stir-fry for 1 minute until fragrant.
06 - Add red and yellow bell peppers to the wok. Cook for 2–3 minutes until slightly tender but still crisp.
07 - Return cooked eggplant to the wok. Stir to combine all ingredients evenly.
08 - Pour prepared sauce over the stir-fry. Cook for 2–3 minutes, stirring constantly, until sauce thickens and coats all ingredients.
09 - Sprinkle green parts of scallions over the dish. Serve immediately with steamed jasmine or brown rice.