Cook the Noodles: If your chow mein noodles require cooking, prepare them according to the package instructions. Drain and set aside.

Prepare the Sauce: In a small bowl, whisk together water, soy sauce, oyster sauce, brown sugar, rice wine vinegar, and sesame oil. Set aside.

Cook the Chicken: Warm 2 tablespoons of vegetable oil in a spacious wok or frying pan over medium-high heat. Add the thinly sliced chicken and cook for 5–7 minutes, stirring occasionally, until fully cooked and slightly golden.

Stir-Fry the Vegetables: Add another tablespoon of oil to the pan. Toss in the minced ginger, garlic, and celery. Stir-fry for 1–2 minutes until fragrant. Add the coleslaw mix and bean sprouts. Stir-fry for another 2–3 minutes until the vegetables are tender-crisp.

Combine the Ingredients: Return the cooked chicken to the pan, followed by the prepared noodles. Drizzle the sauce over the ingredients and gently stir to ensure everything is well-coated.

Finish and Garnish: Toss in the green onions, saving a few for garnish, and stir for another minute to blend the flavors. Remove from heat and garnish with the reserved green onions before serving.