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Participants said they liked Alibaba's Tmall unmanned (无人的) supermarket after 1．(receive) discount for smiling. "2． is amazing to get a discount by just smiling. This is what I have never experienced before," said Dan Shechtman, the 3．(win) of the 2011 Nobel Prize in Chemistry. He 4．(speak) highly of Alibaba's Tmall supermarket.

People can not only enter the supermarket by just swiping a QR code (扫二维码) with their cell phone but also get different discounts 5．(base) on how much they like a product,6．is reflected in their smile. They can make the payment when they leave the supermarket as the mall has already recorded their identity when they enter.

“Unmanned retail (零售) needs 7．(solve) not only problems of 'Who are you? and 'What have you bought? but also the problem of 'What do you want to buy?. That is the 8．(origin) reason why we added this special marketing method,” said Yuan Yuefeng, Alibaba's senior expert in unmanned retail technology.

The unmanned supermarket should not be cold but humane. On 9． one hand it should provide customers 10． more convenient experience. On the other hand it should help business owners provide better services for customers.