There is a dent on the big side of the folding fan.

Does the subject want to ask "why are there indentations on the big surface of the folding fan"? Mark. The indentation on the big surface of the folding fan is not moth-eaten or defective, but a mark specially made by the fan maker when making the fan. You can wrap it in very thin and soft white paper, tie it with thin thread, wrap it in a thin plastic bag, and finally put a special brocade box to prevent moisture and insects. Folding fan is a kind of foldable fan with bamboo or ivory as the fan bone and tough paper or silk as the fan surface.