Loosen the flat rice noodles with your hands and set them aside.
Prepare the Cornstarch Slurry by mixing cornstarch with water. Stir until well combined and set aside.
Heat a wok with 1 tablespoon of oil. Once the oil is hot, add the rice noodles and give them a few quick stirs before adding the sweet soy sauce. Use a spatula to stir the noodles vigorously, ensuring the sauce is evenly distributed. Stir-fry for about 3-5 minutes, or until the noodles start to clump together and are slightly browned. Set them aside.
Add the remaining 1 tablespoon of oil to the wok and heat it up. Sauté the garlic until it is light brown and aromatic, then add the chicken and shrimp. Stir-fry the ingredients until they turn white on the surface, then add the taucheo (preserved soy beans).
Stir a few more times before adding the chicken broth, soy sauce, oyster sauce, fish sauce, sugar, and kailan. Bring the sauce to a boil, then thicken it with the cornstarch slurry. Once the sauce is thick and gooey, turn off the heat.
On a serving plate, place a portion of the fried rice noodles and pour the sauce over the top. Add an even distribution of chicken, shrimp, and vegetables. Sprinkle a dash of ground white pepper over the Rad Na noodles before serving. Rad Na is excellent with a side of pickled green chilies or sliced Thai chilies.