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In hot summer, we uses electric fans.
But, people uses electric fan only in summer, so normally they don't use the fan in other long seasons. To make the fan seasonal,a folding fan from Eastern ancestor has motivated to a modern electric fan. The main fan design consists two modular fans heating / cooling, so in summer, the heating fan as a prop.
And in winter, the cooling fan uses as a prop.
Asan-si , South Korea
Kim Ju Young,