Jiangsu mobile card has no Jiangsu travel code.

It is suggested that if the travel card cannot be washed out, check whether the distance from 20 o'clock is more than 4 hours at the first time. If it exceeds, call someone immediately (anyone can, just need roaming records), preferably for more than 3 minutes. If not, try again the next day. 1 day, it is best to have 5 calls, with an interval of 1 hour or 1.5 hours. Before 20: 00 on the same day, the interval between the first call and the last call exceeded 4 hours.

Travel codes come in four colors: green, yellow, orange and red. Red card: cities with medium and high risks during the trip will be marked with red fonts. Orange card: Close contacts of confirmed or suspected patients in COVID-19. Huang Ka: Overseas countries and regions. Green card: other regions. The results of travel itinerary include the countries visited in the previous 14 days and the domestic cities that stayed for more than 4 hours. The color card only reminds you of the place to visit, and has nothing to do with your health.

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.