If the two-dimensional code is stuck, be sure to raise vigilance.

如果二维码是粘上去的，务必提高警惕。

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I heard that the province to fully change the two-dimensional code number?

问：听说全省要全面换发二维码门牌了？

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How to use the two-dimensional code technology to control the two-dimensional code security?

不用自主的二维码技术怎么把控二维码的安全？

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