Health Codes (Chinese mobile app group)

Health Code (Chinese: 健康码, Jiànkāngmǎ) is a type of application used during COVID-19 in mainland China. It was used as an e-passport that reports if the user has been in an area with current cases of infection. An applicant provides information such as travel history, residence, and medical records. The application will then generate a QR code that identifies the individual's risk level as red, yellow, or green. As of April 2020, over 200 cities and 20 provinces employed health code supported by Alipay. There are a wide range of health codes run by different localities.While many assumed these codes would be phased out post-pandemic, research indicates their continued use and integration beyond the health crisis.

Not to be confused with health codes, regulations concerning public health and safety.
Not to be confused with check-in QR code, which is the QR code to log the check-in locations for contact tracing.
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