Soak the shiitake mushrooms in hot water for 10 minutes, then slice them thinly.
Cook spaghetti according to package instructions until al dente, then drain and toss with 1 teaspoon sesame oil.
Marinate the chicken with Shaoxing wine, cornstarch, and 1 teaspoon soy sauce for 10 minutes.
Scramble the eggs with a pinch of salt in a hot wok, then remove and set aside.
Sauté the chicken in a wok with 2 tablespoons vegetable oil until cooked through, then remove.
Stir-fry celery and mushrooms in the same wok with remaining oil, adding black pepper and soy sauce.
Toss everything together – spaghetti, chicken, eggs, and vegetables – and mix well with remaining soy sauce and sesame oil.
Serve hot and enjoy with your favorite sides!