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The work serves the first aid process for the Olympic venues, mainly for the elderly.Patient information is recorded in qr code,When you need first aid, a nearby security guard or volunteer takes out a cell phone.Scan the qr code on the old man's tag to preview the old man's message, and the system automatically sends out a distress call to nearby medical staff.Make full use of the human resources in the hall, greatly shorten the process of first aid.The most important thing is that this process only requires the use of mobile phones and simple qr codes that everyone has.