Make someone else's mobile phone card yellow when you receive a text message. Is the code someone else's health code?

The reason why the health code changed to yellow code: someone came back from the epidemic area and has not been quarantined for 14 days.

The health code is based on real data, which is declared by citizens on the Internet. After background review, the personal QR code can be generated. As an individual entering and leaving electronic certificate locally, the QR code can be declared once, which is universal in the whole city. The introduction of the health code aims to make the work of returning to work more accurate, scientific and orderly.