The trip code is counted from the day of departure.

For example, if you leave a place on August 1st at 7:00 pm sharp then it will not be counted as full until August 8th at 7:00 pm sharp. In addition, since the service uses base station data, in order to ensure continuous communication and achieve coverage without blind spots, the signals from two base stations at the intersection of administrative divisions may cross-cover, resulting in deviations in the results.

The rule for trip card statistics is that a stay of more than four hours in the local area will be recorded, and the revocation is to start counting for seven days only after you have landed four hours back in the province. Since half of the carriers count statistics in the middle of the night, where you've been, you'll typically update your trip card on day 8 during daylight hours.

Principle of the trip code:

The trip code analyzes the signaling data of the user's cell phone and then obtains the location of the base station to which the user's cell phone is connected, so which cities you have been to, the cell phone as long as the phone is in the power-on state will be connected to the nearby base station, and the operator will be able to query the trajectory of your trip by analyzing the base station data, and then upload the data into the trip code system.

The new version of the travel code is renamed the communication big data travel card, in the Alipay health code page to open, prompted to associate the user's cell phone number, after agreeing to the user can query within 14 days to visit the area of the travel track.

The trip code plays a vital role in accurate prevention and control and traceability, using digital means to analyze the trip path, can accurately exclude the associated people and areas to achieve dynamic zero.