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This is a design which can protect privacy of personal information. According to the order you placed on the Internet and personal information system, the QR code will be generated automatically. The QR code has many limits, so the seller can’t scan your personal information directly. He can only scan the information of the goods you bought. Then he send it to express company. The express company pack up your goods with QR code. Address range from big to small. Every deliveryman can only get the address which included in their work area, such as, China-Beijing-Wangfujing 78th . After the package arrives, consumer receives it and scan the QR c