"Where are you?" This sentence can be said to be the world's most popular text message at present. "Checkin", it is simply reporting "I am here" by using the records to indicate we are attending or participating in an activity. The "check-in" website, the new generation location network, which can be used in cell phone and PC, is very hot currently. This paper describes the concept of LBS, analyzes the current popular "check-in" services of Jiepang, points out its existent problems and gives the corresponding strategy. Finally, this paper looks into the future of "check-in" website.
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