Put the chicken wings in a large bowl and pour half of the soy sauce on top. Turn the wings so they are well-coated and allow them to marinate for 10 to 15 minutes at room temperature.

Heat a wok or large deep skillet over medium-high heat. Sear the chicken wings until they are golden brown on each side but not cooked through, about 3 minutes each side. Pour in the other half of the soy sauce, the sherry, and the Coke and bring the liquid to a simmer. Simmer the wings uncovered for 15 to 20 minutes, until the liquid is reduced to a glaze.

Season the chicken with black pepper. Transfer the chicken to a plate, garnish with scallions, and serve.