Passengers "shop" by scanning QR - Quick Response - codes of the items they want to buy using their smart phones. These goods are later delivered to their home address.

地铁乘客可通过智能手机扫描商品条码，即商品的快速响应码进行购物，随后，所购商品就会被送到乘客家中。

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This wave utilizes a range of technologies, from older tools like bar codes to newer technologies like QR (Quick Response) codes.

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In the age of the QR (Quick Response) code, information from sources like mobile devices and social media, as well as all kinds of new specialized applications, is growing faster in the cloud.

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People waiting for trains in the subway were presented with a wall of products from the store, each with a QR code (Quick Response code) next to it.

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