Chop the scallions. Set aside half of the green portion for the sauce. Add the rest of the chopped scallion to the shrimp, along with 1 teaspoon salt, 2 tablespoons vegetable oil, 1/2 teaspoon sesame oil, 1 1/2 tablespoons cornstarch, 2 teaspoons Shaoxing wine, and white pepper to taste.