Heat a pan over medium-high heat and add 2 tablespoons of neutral oil. Stir-fry the marinated pork until fully cooked, breaking up any clumps.
Add the green onion and garlic, cooking until fragrant.
Toss in the cabbage, carrot, and wood ear mushrooms, then season with soy sauce, salt, sugar, and chicken bouillon powder. Stir-fry for 1-2 minutes.
Add the bean sprouts and vermicelli noodles, stirring everything together. Adjust seasoning if needed, and let the mixture absorb any remaining liquid.
Remove from heat and let the filling cool completely before wrapping.