Rinse and pat shrimp dry, then marinate with cornstarch, soy sauce, salt, and white pepper.
Cook noodles until al dente, drain, rinse, and toss with oil.
Whisk together soy sauce, oyster sauce, sesame oil, sugar, pepper, and broth.
Heat oil, stir-fry shrimp until pink, then set aside.
Stir-fry garlic, ginger, onion, carrots, and bell pepper. Add cabbage until slightly wilted.
Return noodles, add sauce, toss well, then add shrimp back.
Stir-fry briefly, garnish with green onions, and serve hot.