The trip code will be displayed in 4 hours.

In fact, the official has written it very clearly. Communication Travel Big Data Card (Travel Code) is a public 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.

legal ground

Back to the question itself, the bank card analyzes the signaling data and bill data of the mobile phone (connecting 3G, 4G and 5G networks, sending and receiving short messages, answering incoming calls, making calls, etc.). ). Therefore, the premise of having trip data is that users generate these signaling and call list data in the process of using mobile phones. Judging from the way this data is generated, the data generated by the travel card may be inaccurate if the following situations occur. I didn't bring my mobile phone when I traveled. The phone was turned off all the time. Connect WIFI throughout the trip, do not send and receive text messages, do not answer calls. When passing through a certain place, the stay time in a certain place is no more than 4 hours (with user feedback, sometimes it only takes two minutes to pass, which will be displayed on the travel itinerary).

Will be recorded for more than four hours. They are all health codes, and the logic is to count personal vaccination information, travel information, testing information and other related areas; Then it is compiled into the database and searched by two-dimensional code recognition. The initial health code is a technical tool. Which city in Zhejiang should get the health code first? Then all over the country began to follow suit. Then various health codes began to appear in various parts of the country.

At present, the objective situation is that data exchange between provinces can be realized technically (much like online games); However, the enthusiasm of provinces may not be high; For provinces that need personnel mobility and economic openness, they are naturally willing to communicate with each other all over the country (Hongqiao Airport can almost display the national health code). Naturally, these provinces have the initiative to know or communicate with each other consciously. For provinces with weak population mobility, there is no real need to get through the data. Even building some invisible barriers to prevent some population movements will help epidemic prevention. What's more, take this opportunity to use chicken feathers as arrows. Finally, I got a health code, which made some veterans find the feeling of the letter of introduction. Accordingly, these places will naturally not consider turning from spontaneous to conscious, and may even turn from spontaneous to conservative, or from reactionary to more reactionary!