When to update the trip code?

Travel codes are usually recorded after 4 hours. If the mobile phone user stays in a city for less than 4 hours, there is generally no tracking. Mobile phone users who stay in a city for more than 4 hours are usually located by mobile terminals and recorded in big data.

Health QR code

The trip code is obtained by the relevant departments in cooperation with China Telecom, China Mobile and China Unicom by using the data received by the mobile phone and the location of the base station where the user's mobile phone is located.

Travel itinerary code is a free inquiry service provided by 65.438+600 million mobile phone users nationwide. Through this service, mobile phone users can query all the city information they have been to in the previous 654.38+0.4 days.

After obtaining the travel itinerary code, the travel itinerary card will display four colors according to the recent trip of the mobile phone user: green card, Huang Ka, orange card and red card. Travel code, equivalent to health code.