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This is a smart album, that can store a lot of photos, for the old man missing children, and children with corresponding heart-shaped accessories. When the old man missing children can press the button, the signal will be delivered to the accessories, caused by vibration, remind children to bring greetings to the elderly. This does not affect the children's work, to avoid the embarrassment. Other accessories can display the red blue yellow color, notice the old man of good or bad.
Jiangsu Normal University,Xuzhou,China