When the world is constantly changing, Amazon founder Bezos believes that t
November 13-17, 2019
The five-day science and technology feast came to an end
The 21st China International hi tech fair 2019 is expected to be held in Shenzhen Convention and Exh
Food is the priority of the people. Fresh market is not only the outlet, but also the most import
In 2018, self-service purchasing, unattended shopping, face recognition, automatic scanner... In
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