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When shopping in the supermarket, we often can't find the exact goods we want for various reasons, even with the help of shopping guides and signs. So we have to spend a lot of time finding the goods from rows of bewildering things. While the electronic shopping guides can figure out the goods you want with built-in speech recognition systems. Then the lights on the corresponding racks will come on to make you shop with ease.
Hangzhou City, Zhejiang Province, China