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Touchable world is a set of device to help blindman go out and touch the world. When blindman want to go somewhere interesting, they can ask the touchable machine and it will tell where and how to go. When they get near by the feature spot, the touchable machine will ask if they want to travel this view spot, if they say yes, the screen would change into 3D model of the spot and it will introduce the spot for the user. Once they traveled one tourist destination, the machine will record this place. So that they can travel it again when they get home.