Transfer the cooked Oysters to a bowl as they are not to be cooked with rice. Cover with plastic wrap and set aside. Add 1/2 cup cold water to the soup, and pour the soup, with the ginger, over the rice up to the 2-cups-marking on the pot. If soup was not enough, add water to make it to the marking. *Note: Avoid the settlings in the soup, such as sands.