Soak rice noodles in warm/hot water for 30 minutes (or according to package instruction). Noodles should be softened after soaking. Separate the noodles that are clump together. Drain water when done soaking.
Slice beef sirloin.
In a small bowl, combine oyster flavored sauce, soy sauce, dark soy sauce, fish sauce, sugar and water. Mix well, make sure sugar is dissolve.
Bring 1 tablespoon of combined sauce to sliced beef. Marinate for 30 minutes, or up to a couple of hours.
Minced garlic. Should yield around ~3 tablespoon after mincing.
Heat up wok under high heat. Add 1 tbsp vegetable oil to wok. Once wok is heated up, bring all the beef into wok, and stir fry until desired doneness. Remove promptly.
Next, we will be cooking each serving at a time. The stir-frying process goes pretty fast.
Heat up wok under high heat, and add 1/2-1 tbsp of vegetable oil. Once wok is heated up, add ~1 tbsp of minced garlic. Stir fry for 30 seconds or so, or until fragrant (do not burn garlic). Add 1/3 of the chopped Chinese broccoli to wok, and stir fry until it turns darker green (30-60 seconds). Do not overcook greens.
Add 1/3 of the rice noodles and ~2 tablespoon of sauce (adjust according to taste), and continuously stir to evenly cook all the noodles. Noodles should softened further. Be careful not to over cook. This should only take a minute or two.
Add 1/3 of the cooked beef back into the wok. Be careful not to add the liquid at the bottom of the cooked beef into the wok.
Immediately after that, move everything to one side of the wok, and crack an egg to the other side. Break the egg yolk, let it cook for a few seconds, then cover the slightly runny egg with all the noodles.
Let the noodles sit for a few seconds, then mix the egg into the noodles. Remove from heat promptly.
Repeat steps 8-12 for two more servings.
Serve and enjoy!