1. Marinate the Chicken: Start by marinating the sliced chicken. In a mixing bowl, combine the chicken with Shaoxing cooking wine, light soy sauce, cornstarch, and black pepper. Toss everything together until the chicken is evenly coated. Allow it to marinate for at least 15 to 30 minutes to ensure the flavors penetrate the meat.

2. Make the Sauce: While the chicken is marinating, create the stir fry sauce. In a separate small bowl, whisk together chicken broth or water, soy sauce, oyster sauce, dark soy sauce, brown sugar, cornstarch, and sesame oil until you have a smooth mixture. This sauce is the star of the show, so take your time to achieve the right consistency.

3. Sear the Chicken: Once marinated, heat 2 tablespoon of cooking oil in a wok or large skillet over high heat. Carefully lay out the chicken in a single layer; this allows for proper searing. Let it cook undisturbed for about 1 minute until golden brown, then flip the pieces to sear the other side. Once cooked through, transfer the chicken to a plate and set aside.

4. Cook the String Beans: In the same wok, add the remaining 2 tablespoon of cooking oil over medium-high heat. Introduce the string beans in a single layer. Sear them for about a minute before stirring. To tenderize, add 1/4 cup of water and cover the wok, allowing the beans to steam for 60 to 90 seconds until they become bright green and crisp-tender. This step maintains their vibrant color and crunchy texture.

5. Add Aromatics: Remove the lid and stir in minced garlic and ginger, cooking for an additional 30 seconds until they become fragrant.

6. Return the Cooked Chicken to the Wok: With the chicken resting on the side, return it to the wok, allowing it to warm back up in harmony with the string beans. Stir gently to combine.

7. Pouring the Sauce: Give the prepared sauce a quick stir before pouring it over the chicken and string beans. Toss until everything is evenly coated. The sauce should begin to thicken, glazing the chicken and vegetables to create a glossy finish that looks as good as it tastes.

8. Simmering: Let everything simmer for about 1 to 2 minutes. This final touch melds all the flavors together, resulting in a stunning dish that is bursting with juicy, savory goodness.