In your travel itinerary code, the city name is marked with an * (asterisk), which means that there are medium and high risk areas in the cities you visited in the past 14 days, but this does not mean that you have actually visited these medium and high risk areas. Although the green travel itinerary with an asterisk will basically not affect travel, we still encourage everyone to minimize unnecessary walking and unnecessary trips to high-risk areas.
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Travel code is the code of communication big data travel card, which is also equivalent to health code. China Institute of Information and Communication, together with China Telecom, China Mobile and China Unicom, used mobile phones to receive data, which was obtained through the location of the base station where the users' mobile phones were located, providing free inquiry service for the 654.38+06 billion mobile phone users nationwide. Mobile phone users can query all the city information they have been to before 654.38+04 days through this service.