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The chair which is isosceles triangle, can be moved to the left or right and fliped around forward or backward freely. Because of this, it can effectively avoid embarrassment between strangers. The leg of each chair is installed a torsion spring inside that can make the chair to be retrieved after being used. The sitting face is towards the ground when the chair is retrieved. So that in the sunny day, it can avoid direct sunlight that will make the sitting board too hot to sit.
Zhong Shan, China