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In hotel or other public places，blind easily get lost in a large number of rooms，and have the wrong room embarrassment."Touching" is a door handle that seemingly ordinary but actually very special,room number is printed in braille on the inside of the handle. Blind, like everyone, while holding the door handle would be able to identify the room number,not only avoid wrong room embarrassment but also maintaining their self-esteem.
Li Cun Yang Nan Lv Changfu Xu Honglei