Heat up cooking oil in a large sauté pan or wok over high heat. Sauté the pork shoulder for 3 minutes.
Stir in the green onion, garlic, and ginger. Sauté for 2 minutes.
Stir in the black bean paste. Cook for 1 minute.
Add in the cabbage and onions. Cook for 3 minutes.
Add in the cooking wine. Cook until the liquid has evaporated. Then add in the chicken stock and sugar. Bring to a boil. Reduce the heat to medium. Simmer uncovered for 15 minutes.
While the pork and black bean sauce is simmering. Bring a pot of water to a boil. Add the jjajang noodles, boiling for 6-7 minutes. Drain and run under cold water.
The last minute of cooking, stir in the slurry you made of cornstarch and water. This will thicken the sauce.
Portion out the noodles and black bean sauce. Top with a fried egg.