Put the dried orange peel into a porcelain pot and soak it in clear water and cold water. Change the water every day and take it out after three times. Put it in a porcelain basin, add salt and steam 15 ~ 20 minutes, then take it out and cool it, and steam it again the next day. After taking out, cut the orange peel, steam it for three times, take it out, add white sugar and licorice powder, mix well and dry it in the sun. Put the dried orange peel and sour plum juice in the jar and soak it for more than half a month. If the orange peel is soft, it can be mashed into sauce.