2In a mixing bowl, combine the sliced Beef sirloin with Light soy sauce, Shaoxing wine, finely minced Ginger, minced Garlic, whole Sichuan peppercorns, 2 grams of Cumin powder, and Sesame oil. Mix thoroughly to ensure all beef pieces are coated. Marinate for at least 30 minutes at room temperature, or up to 2 hours in the refrigerator.