01 - Combine chicken with soy sauce, Shaoxing wine, cornstarch, and black pepper in a bowl. Mix thoroughly and let marinate for 15 minutes to tenderize and infuse flavor.
02 - Whisk together black vinegar, light soy sauce, sugar, cornstarch, water, and sesame oil in a separate bowl until cornstarch dissolves completely. Set aside for later use.
03 - Heat 1½ tbsp oil in a large skillet or wok over medium-high heat. Add eggplant cubes and stir-fry for 5–7 minutes until golden brown and tender throughout. Transfer to a plate and reserve.
04 - Add remaining oil to the skillet. Add marinated chicken pieces and stir-fry for 4–5 minutes until browned on all sides and nearly cooked through.
05 - Add garlic, minced ginger, and white parts of scallions to the chicken. Stir-fry for 1 minute until fragrant, being careful not to burn the garlic.
06 - Add red and yellow bell pepper pieces to the wok. Stir-fry for 2–3 minutes until slightly tender but still crisp-tender.
07 - Return cooked eggplant to the wok. Toss all ingredients together to distribute evenly.
08 - Pour prepared sauce over the mixture. Stir-fry continuously for 2–3 minutes until sauce thickens and coats all ingredients evenly.
09 - Sprinkle green parts of scallions over the dish. Serve immediately with steamed jasmine or brown rice.