Visitors are in Alibaba's unmanned supermarket at the Light of Internet Exposition of the fourth World Internet Conference in Wuzhen, Tongxiang City of east China's Zhejiang Province, Dec. 4, 2017.(Photo: China News Service/Du Yang)
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Visitors are in Alibaba's unmanned supermarket at the Light of Internet Exposition of the fourth World Internet Conference in Wuzhen, Tongxiang City of east China's Zhejiang Province, Dec. 4, 2017.(Photo: China News Service/Du Yang)
