Regular pot method: Add half of the scallion and ginger inside the chicken. Place all in ingredients in a large stockpot. Add the remaining scallion and ginger. Bring it to a boil over high heat and then slow down the fire to medium low fire. Cover the lid and simmer for 2 hours. strain the broth into individual containers and store them in the freezer for future use
High-pressure method: Add half of the scallion and ginger inside the chicken. Place all in ingredients in a large stockpot. Add the remaining scallion and ginger. Choose chicken stock or stock procedure. When well cooked, transfer the chicken out. Now, you can directly. Or re-heat the chicken stock to remove the extra water off and you will have more concentrated stock.
When cooled, there will be a layer of fat floating on the surface. If you are on a diet, you can remove it but it is better to keep it for a better flavor.