This foldable file box is made as a re-design to SISO based on the principle of easy transportation and space saving. To enhance its portable feature, 3-5 pieces unfolded as a package unit is recommended for sale.

The idea came from the Chinese traditional paper folding. A shape like the Great Wall has been adopted as an interaction between designer and user. Everyone can build up his own shape of Great Wall on table in his way, with different colors and floors.