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If you try to enter public place with a red QR code...immediately an Alam goes off. Chinese govt can easily cut you off from society By remotely switch your COVID passport to code red. Code QR red in China means you need to do your time in a quarantine camp and pay for it.

If you try to enter public place with a red QR code...immediately an alarm goes off. Chinese govt can easily cut you off from society by remotely switch your health passport to code yellow or red. A green QR code needed to access to transport, food...even residential complex.