Someone once said, the invention of the wisdom of this age is intelligent express mail box, thoroughly solved the delivery from the time and space interaction problem of the last 100 meters, at the same time acting as the transmission link between property, the owner, Courier, thus successfully build wisdom city, the harmonious community. WeChat pay general manager Wu Yi once in the surveyed said, no communication, won't produce trade, no pay, no business. So, rather than express yi is a way of interaction, it is a kind of language

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