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After we taking a bullet train, many people will drop the ticket. But the QR codes on the ticket store many of our personal information; there is a risk of information leaking.
We made a small change on the top of the bullet train ticket; we add two dotted boxes which can be easily ripped apart near the QR codes, after using the ticket, the users can destroy the QR codes by ripping apart the dotted boxes so that they can protect their personal privacy.