Cut chicken thighs into thin strips and marinate with shaoxing wine, cornstarch, and salt for 15 minutes.
Finely mince garlic, cut onions into wedges, and chop scallions into ½-inch pieces. In a small bowl, combine dark soy sauce, light soy sauce, oyster sauce, sesame oil, vinegar, shaoxing wine, sugar, and black pepper to make the sauce.
Heat a pan with a little oil and cook the chicken for about 5 minutes until browned, then remove and set aside.
In the same pan, sauté garlic, onion, and scallion whites for 2 minutes. Add the chicken back in along with the sauce and cook for about 3 minutes, or until the sauce has thickened and coats the chicken.
Serve the chicken over a fresh bowl of rice. Optionally top with more freshly cracked black pepper.
