When more than 10 years old, has been phloem Jicheng when oil stripping, spring and autumn can be skinned to the fall of August-September for the excellent quality of stripping. Central peeling length of the product specifications for a little longer (41cm), the cinnamon off, and then slightly wider width specification (8-12cm) cut into strips. That is, the middle section too peeling the product specifications in the trees a little larger than the size of the length and width of the designated good line, one by one from off the trees, the land of oil pit stew or thin stew jacket basket method for processing. April-May, said the stripping, poor quality, said in September the stripping, quality good. Said dry cinnamon bark, processing products pass Gui, Gui plate, and oil prices while Gui Gui.