Prepare the noodles according to the package, but until just al dente.
Combine the light soy sauce and steak and set aside to marinate.
In a small bowl, whisk together the dark soy sauce, oyster sauce, fish sauce, and pepper.
Add a tablespoon of oil to a wok and place over medium heat. Once hot, Add the marinated steak and cook until no longer pink. Remove from the pan.
Remove any moisture in the pan then add the remaining oil. Add garlic and stir for 10 seconds. Add the egg and let it cook until half set, scramble it, and break the cooked pieces into smaller ones. Add the Chinese broccoli and toss it in the wok until it starts wilting.
Spread the noodles in the wok, followed by the sauce mixture and sugar. Turn the heat up to high and let the noodles lay around for 30 seconds without tossing, so the noodles start caramelizing and slightly burning. Toss the noodles and repeat the process for 1-2 minutes.
Return the meat to the wok and combine it with the rest of the ingredients.
Notes
If you don't have Chinese broccoli (gai lan), you can use bok choy or even spinach.