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As the pace of life is becoming more and more fast, we unconsciously take the phone all the time, but we will be on the escalator when watching the phone while ignoring has arrived, so that many people in the elevator on the wrestling. Prompt through the simple installation in the elevator to the end of the place, you can get up remind us ， This will make us more secure when you take the elevator.
Jangxi University of Finance and Economics
NanChang, China
Tian Wu,
Jangxi University of Finance and Economics
