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On 26 January 2014, Baidu (www.baidu.com) launched the "Baidu Migration (百度迁徙; qianxi.baidu.com) service map", based on global positioning system; the service enables users to observe the population movement (both in and out) during Chinese Spring Festival.The map shows that on New Year's Eve, Beijing, Shanghai, and Chongqing are the three cities which have the biggest migration moving out. As for move-in cities, Beijing, Chongqing, and Shanghai are also the winners. In addition to viewing the entire migration dynamics, users can observe the in-out movement of a single city. For example, on New Year's Eve, people mostly move out from Shanghai to Jiangsu, Zhejiang, and Anhui.The “Baidu Migration” service started for the Spring Festival and will end on 28th February. This service can be applied to other major festivals and events in China.&#160;