Heat oil in a wok or large skillet over medium high. Add pork and cabbage and stir fry until meat is no longer pink, about 5 minutes. Add chicken broth, soy sauce, and ginger. Bring to a boil and reduce heat to low. Simmer 10 minutes, stirring occasionally.
Add noodles and cook until tender, about 2 to 4 minutes. Stir in onions (they should curl) and serve.