Clean the king oyster mushrooms, pork neck, and bean sprouts thoroughly.
Cut the pork neck into bite-sized pieces.
Heat cooking oil in a pan and stir-fry the pork neck.
Once the pork neck is cooked, add the king oyster mushrooms and stir-fry together.
Add the bean sprouts and stir-fry quickly over high heat.
Season with soy sauce, salt, and pepper.
Transfer to a plate to finish.