The health code is black for the following reasons:
First, the health code applied by the user is under review, and the green code, yellow code or red code can be displayed after the review is completed;
The yellow health code indicates that the information needs to be further improved and verified before it can pass (such as temperature measurement, etc. ), or the health pass card has expired and needs to be declared again;
Red health code means: those who do not meet the travel conditions should report to the local community (village) or unit and notify the local epidemic prevention and control department when necessary;
Green health code stands for: it can be passed directly.
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Third, the user has not been successfully authenticated. Please try again.