In a bowl add the dark soy sauce, vegetable oil, and cornstarch, to the flank steak and mix until the beef is completely coated. Set aside.
Heat a wok on high and oil evenly to coat the pan. Then sear the steak until it is 80% cooked through, and transfer it back to the marinade bowl.
Add more oil to the wok and stir in the garlic and Chinese broccoli. Make sure to stir constantly to prevent the garlic from burning.
Cook the wide rice noodles according to the package and set aside. (Remember, 8 ounces of dried noodles will rehydrate to 16 ounces.)
Add the cooked noodles and the cooked steak, then stir again.
Push the mixture to one side to let the empty side of the wok heat for 10 seconds. Then add two beaten eggs and scramble.
Next, combine oyster sauce, sugar, soy sauce, dark soy sauce, fish sauce, and white pepper in a small bowl. Pour the sauce into the wok and make sure everything is evenly coated.
Stir-fry the mixture for another 1-2 minutes until everything is mixed well and serve!