Cut pork neck, potatoes, onion, and carrot into bite-sized pieces.
Add cooking oil to a pan and stir-fry the pork neck.
Once the pork is cooked, add the potatoes, onion, and carrot and stir-fry.
Add soy sauce, minced garlic, sugar, and pepper, then stir-fry.
Pour in enough water to almost cover the ingredients and bring to a boil.
Simmer over medium-low heat until the potatoes are cooked through.
Taste and adjust seasoning with salt if needed.