Rinse angel hair noodles under running water and drain well.
Cut the pork into bite-sized pieces.
Chop the onion and green onion.
Heat cooking oil in a pan and stir-fry the pork.
When the pork is cooked, add the onion and green onion and stir-fry.
Add jajang sauce and mix well while stir-frying.
Add a little water and bring to a boil.
Add the angel hair noodles, quickly stir, then turn off the heat.
Serve in a bowl to finish.