Poria, the name of Chinese medicine. It is the dried sclerotia of Poria cocos (Schw.) Wolf of the Poria cocos family. Excavate from July to September, remove the sediment after digging, pile up "sweat", spread out to dry the surface, then "sweat", repeat several times until wrinkles appear and most of the internal moisture is lost, then dry in the shade. It is called "Fu Ling Ge"; or fresh Poria is cut into different parts and dried in the shade, respectively called "Fu Ling block" and "Fu Ling piece".