For the sauce, heat the oil in a wok or similar pan over medium heat, add the ground pork, and stir fry until fully cooked, about 3 minutes. Add the ginger, half of the minced green onions, and garlic, and continue cooking until aromatic, 10 to 20 seconds. Add the wine and continue cooking over medium heat until fully evaporated, about 2 minutes. Add the soybean paste, h