【秒速pk10_pk10下载地址_秒速pk10下载地址】First Smart China Expo attracts visitors in Chongqing

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A young visitor wears a mixed reality (MR) device during the first Smart China Expo in southwest China's Chongqing, Aug. 24, 2018. The first Smart China Expo is held here from Thursday to Saturday. (Xinhua/Wang Quanchao)

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