Ingredients 1/4 cup low-sodium soy sauce 1 tablespoon rice vinegar 1 teaspoon toasted sesame oil 1 teaspoon gochugaru (Korean hot red-pepper powder) 1 teaspoon toasted sesame seeds 1 scallion, finely chopped (2 tablespoons) Pinch sugar 1/2 pound shrimp, peeled, deveined, tails removed, and chopped into 1/2-inch pieces 1 1/2 teaspoons kosher salt, divided 1/4 teaspoon baking soda 3/4 cup unbleached all-purpose flour 3/4 cup rice flour 2 teaspoons cornstarch 1/2 teaspoon baking powder 1/2 teaspoon sugar 1 egg, lightly beaten 1 1/3 cups cold water 1 cup cabbage kimchi, drained, squeezed dry, and chopped, plus 2 tablespoons liquid reserved, and more chopped kimchi for serving 3 scallions, cut into 2-inch lengths and white parts halved lengthwise (about 1/2 cup), plus chopped scallions for serving 6 tablespoons safflower oil or other neutral oil, for frying Preparation Dipping Sauce: Stir together all ingredients....