What cities have stars in travel itinerary code?

Cities with asterisks in the itinerary code refer to medium and high-risk cities and regions with serious epidemic situation in COVID-19. Now Shanghai, Qingdao, Binzhou, Changzhou and Quanzhou, Fujian are all cities with asterisks. When the epidemic situation is under control, if there is no epidemic situation for a period of time, it can be reduced to a low-risk area and the asterisk will disappear. At present, the epidemic situation in COVID-19 is spreading all over the country, so it is suggested to go out less and try not to go to middle and high risk areas.

Generalization of travel code

The itinerary code is a public welfare itinerary inquiry service jointly launched by China ICT Institute, China Mobile, China Telecom and China Unicom under the guidance of the Ministry of Industry and Information Technology. I can provide users with free domestic city certificates of countries and regions I have been to in the past 14 days for 4 hours.

This passage introduces the travel itinerary code in detail. First, the Ministry of Industry and Information Technology and the three major communication operators jointly launched. So in China, as long as your mobile phone uses a mobile phone card, the signal sent by your mobile phone will be detected by the corresponding communication company.

The location of each base station tower is fixed, and they have a clear city ownership. Which base station our mobile phone accesses will be located in which city, and the itinerary code will also record the places you have been. This is easy to understand. Usually, when we travel by high-speed rail or by car, we will receive SMS reminders from mobile phone operators, and the trip code is similar to the principle of this SMS.