Marinate the Pork: In a bowl, combine 200g minced pork, 1 tsp cooking wine, 1 tsp light soy sauce, and 1-2g white pepper. Mix vigorously in one direction for about 1 minute until the meat becomes slightly sticky. Set aside to marinate for 20 minutes.
Tip: If the meat seems dry, add 1-2 tsp water and mix until absorbed.
Prepare Vegetables: Wash and drain the napa cabbage. Drain and cut in half lengthwise, then slice into 2 cm-wide strips. Finely chop the scallion, dividing it into two portions (about 5g for sautéing, 10g for garnish). Cut ginger into thin strips.
Sauté Aromatics: Heat a pot or wok over medium-low heat. Add 1 tbsp cooking oil. Once the oil is warm, add the ginger strips and the smaller portion of chopped scallions. Sauté for 30 seconds until fragrant, being careful not to burn them.
Cook the Pork: Turn the heat up to medium. Add the marinated minced pork. Use your spatula to break it up and stir-fry for 2-3 minutes until it's fully cooked and no longer pink. Ensure no clumps form.
Cook the Cabbage Stems: Add the harder napa cabbage stems to the pot first. Stir-fry for 1-2 minutes until they begin to turn translucent and soften. This step is crucial to prevent hard, undercooked stems.
Cook the Cabbage Leaves: Add the softer napa cabbage leaves and continue to cook for another minute until they have wilted and released some moisture.
Simmer the Soup: Pour in 500-600ml of water. Bring the pot to a boil, then reduce the heat to a simmer. Cover and let it cook for 2-3 minutes to allow the cabbage's sweetness to fully infuse the broth.
Add Rice Cakes: Uncover, add the rice cakes to the pot, and gently stir to separate them and prevent sticking. Cover the pot again and let it simmer for 5 minutes. Check once; if the rice cakes can be easily pierced, they are done. For thicker cakes, simmer 1-2 minutes longer.
Season and Serve: Season the soup with 3-5g salt and a pinch (about 0.5g) of white pepper. Stir well, taste, and adjust if needed. Turn off the heat, stir in the remaining chopped scallions, and serve immediately while hot.