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the mobile payment supported by smart phones makes people's consumption more convenient and gets rid of the embarrassment of forgetting their wallet. the mobile payment of smart watches will further u smart watches can realize video chat, telephone and other functions, and meet the social needs of users anytime and anywhere. by wearing a smart watch, users can raise their wrists and realize dialogu at present, the most widely used smart watch is to help parents track their children's location and related situations. by wearing smart watches, children's parents can remotely monitor their children the application of watches in public transport links will make public transport more convenient and smooth. when people take public transport facilities, they no longer need complicated links such as through preset identity information, smart watches can realize identity authentication in different occasions, such as gymnasiums, airports, ls, cars, homes and so on.