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After digging, Gastrodia elata should be processed in time and it is generally advisable to process it within 5 days in order to avoid loss caused by ramie. Gastrodia processing has the following several steps: (a) sub-files. The size and integrity of gastrodia elata directly influence the cooking time and drying rate, and roughly grades the size and degree of perfection of fresh hemp, which is convenient for processing. Fresh jujube weight 0.3 kg or more for a file, 0.15-0.3 pounds for the second gear, 0.15 pounds of the following hemp body is a complete third gear, excavation, pest damage fresh mahjong into other foreign goods. (b) Wash the soil. Note that Gastrodia can not be soaked for a long time. The Gastrodia elata washed on that day must be cooked on the same day. Otherwise, the finished product will look black. (c) cooking. 1. Steaming method: steam in the steamer for 5-30 minutes. Time: 15 to 30 minutes for a file, 10 to 15 minutes for a second gear, and 5 to 10 minutes for a third gear. Degree: A slight white heart is the degree of gastrodia, and the method of judgment is the same as the method of cooking. Steaming method Gastrodia elata pharmacodynamic loss. 2, cooking methods: a large number of processing steaming difficulties, more cooking methods. After the water is opened, the gastrodiae is divided into batches of tap water, and the water depth should exceed the amount of gastrodia elata, and stirring with a smooth wooden stick will make the gastrodiae evenly heated. Less gastrodin may also be used to cook a file of Gastrodia, over 3 to 5 minutes and then into the second file of Gastrodia, 3-5 minutes into the third file Gastrodia, one pot and then remove it after cooking. Time: 10-15 minutes for a file, 7-10 minutes for second gear, and 5-8 minutes for third gear. Degree: White heart of 5-8mm is left on the section, accounting for one-sixth to one-fifth of the section. Judgment: Take Gastrodia in the dark to see the light, see the middle of the transparent Gastrodia still have a shadow thickness of the stem can be out of the pot; You can also use the force to pinch Gastrodia Gastrodia, if issued a "bang" sound, then that the boiling time is appropriate . A large number of processing can open Tianma examination, as long as the white heart accounts for less than one-fifth of the diameter. Gastrodia elata boiled with a small amount of alum in the water, with a ratio of 10 pounds of gastrodin plus 0.2 pounds of alum. The processed gastrodia was translucent and of good quality and had no effect on the endoplasm. (d) Drying. 1, easy drying. All kinds of self-made cooking fire drying. Start baking temperature 50-60 °C (should not be too high, otherwise the sugar heart, should not be less than 45 °C or otherwise mildew), so that the body Gastrodia Gas rapid evaporation, to seven, eighty percent dry, remove the pressure bias, found that the bubble with Bamboo puncture deflated. On the second time, adding sulfur sulfur mud ball (three parts of sulfur, seven parts of water and uniform drying) on ​​the charcoal fire can increase the lightness of Tianma and prevent insects. When the gastrodins are drying fast, the firepower is reduced to 50°C. In case of a sunny day, the sun can be used during the day and it can be dried up at night. The gastrodin, yellowish-white, and translucent, thus processed, are called "bright hemp." 2, mechanical drying. Use a dryer or drying room for drying. The best working condition is 65°C, 1msec wind speed. Large batches of mechanical drying, stable quality, processed gastrodia quality. (e) Grading. The commodity dried gastrodia is divided into four grades: First grade: The average monomer weight is more than 38 grams, within 26 kilograms per kilogram, it is flat and long oval, yellow and white surface, solid body, translucent, no hollow, dry, insects, Mildew. Second class: The average monomer weight is 22 grams or more, within 46 pieces per kilogram. It can be slightly bent, and other requirements are the same. Third grade: The average weight of the monomer is more than 11 grams, and less than 90 per kilogram. Can be flattened and curved, with yellowish-white or brown-yellow surfaces. Others are the same. Fourth class: The average weight of the monomer is about 8 grams, about 120 per kilogram, including hollow, broken pieces, color of gastrodia, no mildew, ash. Processing method of snow gastrodia: "Snow gastrodia" is a high-grade medicinal material that can be used as a gift or for export. Its processing technology requirements are relatively high, the methods are as follows: 1, selection Ma: a good file a good gastrodin. 2. Peeling: (1) Before cooking, use “iron scraper†to peel off the skin and dry it with the aforementioned method. Special attention should be paid to the peeled gastrodia which must be immediately immersed in water. The day's cooking process, or the color becomes black. (2) During the above cooking method, the hemp was boiled and peeled off, and then dried and processed in the same manner as described above. 3, drying: Drying must strictly control the temperature, should not be too high. 4. Notes: (1) Use sulfur and alum. (2) Bakerooms and utensils must be kept clean to ensure the white color of the hemp body.