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Because many countries will take the fingerprints of infants and record it .Guardians only need to apply children's tickets for children under the age of 12 when they are buying tickets. Strangers can not buy tickets for children.After the information checked child's fingerprint ticket will be automatically generated and binding with guardian's tickets.In this case, neither getting into or out the station,the information of both guardians and children must be matched so that children can be taken into the station or leave,otherwise security doors will not open and will make noise if it's strangers want to take children out.
Zhejiang Sci-tech University
Hangzhou City Zhejiang Province, China
Dengtao Wu,
Zhejiang Sci-tech University
Yang Binlan,
Zhejiang Sci-tech University