Marinate the Pork: In a bowl, combine the sliced pork with water, cornstarch, Shaoxing wine, oil, and oyster sauce. Mix thoroughly and let it marinate for 20 minutes.
Mix the Sauce: In a small bowl, stir together the water, oyster sauce, light soy sauce, dark soy sauce, sugar, and white pepper. Set aside.
Start Cooking: Heat a wok over high heat until it's just starting to smoke. Add 1 tablespoon of neutral oil, swirl to coat, and toss in the marinated pork. Stir-fry quickly until the pork just loses its pink color, around 1 minute. Transfer to a plate and keep nearby.
Sauté Aromatics: Lower the heat to medium. Add the remaining tablespoon of oil along with the ginger slices and the white sections of the scallions. Stir-fry for about 30 seconds, just until the scallions are starting to brown and the ginger is fragrant.
Combine Ingredients: Turn the heat up to high. Pour in the Shaoxing wine and let it bubble for 15 seconds. Add the rice cakes, prepared sauce, and the cooked pork back into the wok. Stir constantly for about 30 seconds, making sure the sauce is coating everything evenly and the rice cakes aren't sticking.
Simmer: Lower the heat to medium-low, cover the wok, and let the rice cakes cook for 2 minutes to finish softening. They should be tender yet chewy.
Finish and Serve: Remove the lid, raise the heat to high again, and stir in the green scallion tops. Stir-fry briefly until there’s just a little sauce left in the pan—about 1 more minute. Serve immediately.