Slice the pork into thin strips and marinate in soy sauce, oyster sauce, and sesame oil for 15 minutes.

Bring a large pot of salted water to a boil and cook the thick noodles for 3-5 minutes until al dente. Drain and rinse with cold water.

In a large skillet, heat vegetable oil and stir-fry the marinated pork until golden brown, about 4-5 minutes.

Add cabbage, mushrooms, and green onions to the skillet. Cook for 3-4 minutes until the vegetables are tender but crisp.

Add the drained noodles to the skillet with any remaining marinade. Toss for 2-3 minutes until well-coated and heated through.

Adjust seasoning to taste with additional soy sauce or sesame oil, and garnish with chopped green onions.