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What you say is true, and makes no difference. QR codes are very popular and in very common use in China.

Yup, now when I wanna pay for some drink, I only need to take out my mobile, then open wechat, then scan the QR code showed on the vending machine screen.

Like this: http://i.imgur.com/mlIr3QP.jpg

Vending machines in the US only take coins, like a post-apocalyptic stone age world. So ahead of time...

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