How to Make It
In a large saucepan of boiling water, cook the noodles until al dente, about 3 minutes. Drain in a colander and return the noodles to the pan. Fill the pan with cold water, swish the noodles and drain; repeat. Leave the noodles in the colander and lift them with your fingers occasionally to dry slightly.
In a small bowl, blend the stock with the oyster sauce, soy sauce, sugar, chili oil and 1 teaspoon of salt.
Heat 1 tablespoon of the vegetable oil in a wok. Add the eggs and cook over moderate heat, stirring, until set, about 1 minute. Transfer the eggs to a plate and break them up into small chunks. Add the remaining 1 tablespoon of vegetable oil to the wok and heat until shimmering. Add the carrot and celery and stir-fry over moderately high heat until softened, about 3 minutes. Add the pork, noodles and sauce mixture and toss to coat. Season lightly with salt, add the scallion and eggs and toss well. Transfer to a large, shallow bowl and serve at once.