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Most of the wheelchair in the market can not be ride on the road steadily. For this reason, we made a such a design. This is a wheelchair which can be ride both on the common road and stairs. Inside of the wheelchair is equipped with infrared detector. When it detects stairs, it’s wheels can be reshaped and the lazyback as well as the pedals will also do some adjustment at the same time. And then start to climb the stairs. When the wheelchair go downstairs, the principle is same as go upstairs. On the road, the wheelchair can move like ordinary wheelchair.