Place the same pan over high heat and pour the vegetable oil.
Once the oil is ready, add the garlic and chopped onion.
Cook until the onion softens, then add the carrot and celery.
Mix and cook for 2 to 3 minutes, then add the cooked chicken, peas, and cabbage.
Season with salt, then continue mixing until the vegetables are cooked.
Transfer the vegetables to a plate and set aside.
Place the empty pan back into the heat.
Pour about 3/4 cup of the liquid from the chicken earlier and add the soy sauce.
Cover and bring to a quick boil, then add the softened bihon noodles.
Continue stirring until the noodles are cooked and separated.
Add the vegetables back into the wok and mix to combine with the bihon noodles.
Take the pan off the heat and transfer your pancit bihon into plates.
Serve pancit guisado with some slices of calamansi (or lemon), and enjoy!