The trip code is the "trip card", the official name is "communication big data trip card", is guided by the Ministry of Industry and Information Technology, China Academy of Information and Communication Technology, China Telecom, China Mobile, China Unicom *** with the launch of the trip query service, can provide users with free proof of their past 14 days (we have now changed to 7 days) to visit countries (regions) and domestic cities. It is a free service that provides users with proof of the countries (regions) and domestic cities they have visited in the past 14 days (we have now changed it to 7 days).
Today I'll share with you and say that we are during the epidemic. Usually in and out of various public **** places, to show the trip code, how does it know which places we have been to which days? How long do we stay before it is recorded? Even if you unplug the SIM card from your cell phone and turn it off. Even if you unplug the SIM card from your cell phone and turn it off, we can't escape from the tracking of the card, it will always record every place you stayed in 14 days, what is the principle of this? And will such a small trip code violate the privacy of our personal trip? If you've been reading this article for a while, you'll understand exactly what's going on.
The code was introduced in February 2020, and the code is guided by China's Ministry of Industry and Information Technology and launched by the China Communications Agency, the three major service providers and other strong national travel query service. For the country's 1.6 billion cell phone users, that our population of 1.4 billion out of the head of the 1.6 billion cell phone users is obviously on behalf of a person with two machines, or even a person with three machines, and now buy a cell phone SIM card it must be real-name system, so the cell phone data and people each on the number and is not a difficult thing. Because we can not go out without a cell phone, and as long as we bring a cell phone, it will be able to faithfully record.
One of our trips, whether it's on or off, with or without a network, can't escape the modern network. So what exactly is the principle that trip cards end up using to do this?
We all know that the normal communication services of the cell phone, such as calling, texting or surfing the Internet, need to be connected to the base station inside, each base station's specific information, including the location, number, operator are clear, once we go to a certain place to surf the Internet or make a phone call, then there is a connection to the base station, this time it will be the base station will record our information and transmit it to the data terminal, so that the data can be used in the network, and the data will be transmitted to the data terminal. The base station will record our information and transmit it to the data center to confirm our location. Of course, this method is only applicable to places where signaling base stations are built.
If we traveled to a deep forest where there was no signal, the base station identification would probably not work. That's why our country has prepared a second line of defense, which is GPS positioning, which doesn't come from base stations. Instead, it comes from satellites in orbit in space, and the GPS in the cell phone is automatically docked with the satellites so that it can locate the exact position of our users.
How long do we stay in each place before it is recorded?
The trip code doesn't record every place we visit, but if we arrive in a new city and stay less than four hours, it won't be recorded by the trip card's big data, so the system will determine that we're probably just passing through. Then there is another phenomenon that is to say that our location is located in the junction of two cities, although it has been out of the province, but because of the province's signal base station signal is stronger, so the place of belonging is still judged to be in the original city.
While the trip code can accurately determine your exact location, there are times when the trip code is wrong.
Said trip code as a newly launched feature, there are also still some functional loopholes. For example, the region drift, obviously we have not visited the region it, but appeared on their own trip card. There are two possibilities for this phenomenon, one is that we are located at the junction of two cities, and as a result, the signal is grabbed by the farther away base station, resulting in a shift in the display of the location.
The other is that the operator's system is malfunctioning, in which case we can verify by calling the operator's customer service number, and if the operator verifies that it is correct, we can ask them to remove it.
So why is it that even if we unplug the SIM card from the phone or turn it off? It's also completely impossible to escape the tracking of trip codes.
Because our cell phones don't completely stop functioning after we turn them off, turning them into a smart brick. Instead, it maintains a certain working condition inside, just in case, and the cell phone's unique identification code, imei, comes in handy at this time. Exclusive means a cell phone it, only a unique hobby, equivalent to the human identity card. How do we check this imei number?
If it's an old man's phone, we only just need to open the inside of the phone to see it.
If it's a smartphone, we can enter the code "Hoshii 06 Hoshii" through the dialing page. Once the input is done it will immediately show the imei number of this phone on the screen.
As long as we carry this number on the phone, there is a way to be recognized by the relevant nearby base stations, generating data to be fed back to the data center, which is also the reason why the communication big data trip card app needs to obtain Bluetooth access. Then again with Bluetooth after it, not only can record the trip, but also can record the activities of nearby cell phones, which also includes contact time, really complete the whole staff seamless.
Of course, the SIM card does not violate the privacy of any of our other phones because it doesn't have that much access to the signaling data of the phone. The state has put in place stringent protection mechanisms to prevent this information from being stolen by others, and naturally it will not be used for private purposes, so we can rest assured that it will be used without fear.
Well, after you read it, you have an understanding of our trip code, and if you think it's good, then don't forget to give me a point of praise, and have time to share it with your friends around you.