Wash the chicken wings thoroughly and pat them dry.
Mix soy sauce, sugar, minced garlic, cooking wine, pepper, and water to make the marinade.
Heat oil in a pan and grill the chicken wings on both sides until golden brown.
Pour the marinade over the wings and simmer over medium-low heat.
Cook the wings, flipping them, until the sauce thickens and the wings are fully cooked.
Sprinkle with sesame seeds and chopped green onions to finish.