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      Have you ever heard of Dididache? Dididache (嘀嘀打车), a taxi-hailing smartphone app（应用程序）which is believed to be created by Tencent, has recently a    in Xiamen, and more than 700 taxi drivers in the city have used the app.
    The app s   the real-time locations of taxis on a map using the GPS technology and makes it possible for users to hail (招呼) a taxi on their smartphones. The u   request will be sent to the nearest taxi drivers who will decide w  to accept the order or not.
Taxi-hailing apps are very p   in Beijing, Shanghai, Hangzhou and Nanjing, having gained tens of thousands of users. H  , the city's taxi-control departments doubt its helpfulness and have said it may not be s   for Xiamen.
    The app has been criticized (指责) for disturbing market order, and creating d  for passengers who do not use the app to hire a cab. Many users complain that they are only useful when most taxis are idle (空驶), and hiring a taxi can still be challenging during bad w and rush hours. Can this app be in use for long? Technology might make a great d   to our life. Let's wait and see.