The main feature of Japanese folding fans is that they are as wide as big bones (the widest part of big bones is 10 to 12MM, and the narrowest part is 7 mm; The length is 3 1 to 32CM. ), mostly ninth and eleventh gears. The so-called "file" is the number of fan bones. The two bones at both ends of the fan are big bones, and some bones between the big bones are small bones. The sum of the number of big bones and small bones is the gear number of the fan.

In fact, folding fans were introduced to China from Japan via Korea, but many styles have evolved in China.

Due to the favor of literati and bureaucrats for folding fans, the big bones are gradually widened (about 2~3CM) for creation and sculpture. The big bone that caused China's folding fan is obviously wider than the small bone.

In addition, there are twelve, thirteen, fourteen, sixteen, eighteen, twenty, twenty-two, twenty-four, thirty or even forty folding fans in China. The length and opening are also different.