Put gastrodia elata into black-bone chicken, add enough water, and add appropriate amount of salt and seasoning. Because it is a medicated diet, you don't need to put too many ingredients, then cook it with fire, spray steam and continue cooking for three to five minutes. It depends on the size of your black-bone chicken, and it takes a long time, usually five or six minutes. Turn off the fire when you have enough time, and you can boil it when it is cold. Note: there is steam in the pressure cooker, so it must wait for cooling.