In a medium bowl, combine the chicken, 1 teaspoon rice wine, the cornstarch, ¼ teaspoon salt, and the white pepper. In a small bowl, combine the black soy sauce, vinegar, sesame oil, sugar, chile oil, broth, the remaining 2 teaspoons rice wine, and the remaining ½ teaspoon salt.

Heat a 14-inch flat-bottomed wok over high heat until a bead of water vaporizes within 1 to 2 seconds of contact. Swirl in the vegetable oil, add the dried chiles, and carefully add the chicken, spreading it evenly in the wok. Cook undisturbed 1 minute, until the chicken begins to brown. Then, using a metal spatula, stir-fry 1 to 2 minutes or until the chicken is browned on all sides but not cooked through. Transfer to a plate and set aside.

Add the ginger, garlic, ground Sichuan peppercorns, and scallion to the dry wok and stir-fry for 15 seconds. Return the chicken to the wok and toss to coat. Stir the sauce mixture and carefully swirl it into the wok and stir-fry 30 seconds or until the chicken is just cooked through and the sauce is slightly thickened. Remove and discard the chiles. Serve immediately.