Begin by soaking rice noodles (bihon) in room temperature water (27°C/80°F) for 8-10 minutes until pliable but not too soft. Drain and set aside. During this time, prepare and organize all vegetables (mise en place).
Heat cooking oil (mantika) in a wok or kawali over medium-high heat (180°C/350°F). Pan-fry shrimp (hipon) for 1 minute per side until pink. Remove and set aside. In the same pan, brown Chinese sausage (chorizo macau) slices until lightly crisp.
Lower heat to medium (160°C/320°F). Sauté minced garlic (bawang) until fragrant, then add sliced onions (sibuyas) and cook until translucent. Add shredded chicken and chopped celery (kinchay). Crumble in the shrimp cube and stir well to combine.
Increase heat to medium-high (180°C/350°F). Add julienned carrots and cut green beans (sitaw), cooking for 2 minutes. Add chopped cabbage (repolyo) and stir-fry for 1 minute until slightly wilted.
Add the drained noodles to the wok. Pour in soy sauce (toyo) and chicken stock, gently tossing with tongs until the noodles absorb the liquid. Return cooked shrimp to the pan. Season with black pepper (paminta) and add chopped parsley (wansuy). Continue tossing until well combined and noodles are cooked through, about 3-5 minutes.
For reheating, warm over medium heat (160°C/320°F) with a splash of water. Serve hot with calamansi (kalamansi) halves on the side.