One side of Yuzhu folding fan is flat and the other side is curved, which increases stability. The bent fan bone is to make the folding fan more stable and compact. The specific method is to open a suitable and unified groove in the fan bone, and then paste a section of eucalyptus to create a curved shape, which makes the whole fan more stable. Yuzhu folding fan, also known as Suzhu folding fan, is euphemistically called "Yuzhu" because its fan bones are smooth and delicate, and its color is crystal clear. In order to create a waxy and glossy Yuzhu fan, of course, there should be no spots on the surface of bamboo skin. Therefore, one side of the Yuzhu folding fan is flat and the other side is curved, which increases stability.