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People visit the 8th China Satellite Navigation Conference in Shanghai, east China, May 23, 2017. The 8th China Satellite Navigation Conference kicked off on Tuesday. (Xinhua/Du Xiaoyi)
People visit the 8th China Satellite Navigation Conference in Shanghai, east China, May 23, 2017. The 8th China Satellite Navigation Conference kicked off on Tuesday. (Xinhua/Du Xiaoyi)