Mix the liquid ingredients in a small bowl until crystal clear, ensuring the soy sauces and oyster sauce blend well for the glaze.
Heat a pan with lard or oil over medium-high. Brown pork for 2–3 minutes, stirring occasionally.Optional: Slice thinly for tenderness. Heat the last tablespoon of lard in the wok. Stir-fry onion, garlic, and spices for 30 seconds until fragrant. Add mushrooms and pak choy and spring onion cooking for 1–2 minutes until tender-crisp.
Add noodles, pork, and sauce, mixing well. Season to taste. Stir-fry on high for 1–2 minutes until slightly charred.
Serve hot. Top with green onions, sesame seed, or a drizzle of sesame oil for extra flavor.