Mix the sliced chicken, light soy sauce, cornstarch, sesame oil, and baking soda together in a medium bowl.
Let the marinated chicken rest at room temperature for 15 minutes.⏱ 15 min
Whisk the light soy sauce, oyster sauce, dark soy sauce, sugar, and white pepper in a small bowl to make the seasoning sauce.
Heat 1 tablespoon of vegetable oil in a 12-inch wok or large skillet over high heat until smoking.
Add the chicken slices and stir-fry for 2 to 3 minutes until fully cooked and golden around the edges.⏱ 3 min
Transfer the cooked chicken to a clean plate and set it aside.
Wipe the wok clean and heat the remaining 1 tablespoon of vegetable oil over high heat.
Toss in the minced garlic and julienned carrots, stir-frying rapidly for 1 minute until fragrant.⏱ 1 min
Add the fresh egg noodles to the hot wok and spread them into an even layer.
Pan-fry the noodles untouched for 1 to 2 minutes until the bottoms turn slightly crisp.⏱ 2 min
Pour the prepared sauce evenly over the hot noodles.
Toss the noodles vigorously for 1 minute until they absorb the sauce and turn rich dark brown.⏱ 1 min
Return the cooked chicken to the wok along with the fresh bean sprouts and green onions.
Stir-fry everything together over maximum heat for 1 minute until heated through and bean sprouts remain crisp.⏱ 1 min
Remove from heat and transfer to serving plates immediately.