Should be soaked in warm water or cold water 12 hours, after changing the water, it should be rubbed repeatedly and put into an aluminum bucket or aluminum pot (2 ~ 3 bamboo grates should be placed at the bottom of the bucket or pot, and the water should be wide to prevent the bottom of the pot from boiling). When it is soft, that is, the edge of abalone is easy to tear off, put it in a warm water basin (the original soup is reserved. Remove the edge and mouth), wash it again and put it into the original soup to continue cooking until it is cooked thoroughly (if it is urgent, add alkali to the water for the second cooking, and add 20 grams of alkali to every 5 kilograms of dried abalone). Boiled abalone, cooled soup and stored in refrigerator; If you don't have a refrigerator, you can cook it in the original soup once a day.