Place the beef in a large bowl. Add the light soy, oyster sauce, sesame oil, cornflour, and season with salt and pepper. Mix well to combine, then refrigerate for at least 30 minutes.
Combine the sweet soy, light soy, oyster sauce and Shaoxing in a small jug and mix to combine. Set aside.
Blanch the noodles in boiling water for 1 minute, then gently separate and strain. Rinse under cold water.
Heat some oil in a wok over high heat. Cook the beef in batches for 1-2 minutes, until browned on both sides, then set aside.
Add a little more oil to the wok. Cook the ginger, garlic and whites of the spring onions. Stir fry for 1 minute.
Add the noodles, toss to combine. Push everything to the side of the wok and pour in the egg. Stir to scramble quickly, then stir in garlic chives.
Pour in sauce and stir quickly to incorporate. Then return the beef to the pan and add the beansprouts and greens of the spring onions. Toss to combine then remove from the heat.
Serve immediately
