What is the reason why the trip code can't be opened?

The trip code can't be opened because the network signal is not good. The travel card system is not working properly. You can refresh the network and turn it on, or you can restart your phone. If the travel card service is abnormal, you can also contact the operator by SMS. After receiving the prompt, enter the last four digits of the owner's ID card to query the travel information of 14 days.

Travel convenience code

The trip code was launched by China Information and Communication Research Institute in conjunction with three major operators. The data received by China Telecom, China Mobile and China Unicom are obtained through the location of the base station where the user's mobile phone is located, providing free inquiry service for 654.38+06 billion mobile phone users nationwide. By analyzing the location and movement trajectory of the mobile phone through the base station, it is proved that the tool of personal travel trajectory can analyze and judge whether the user of the mobile phone number passes through the high-risk area, and then effectively take corresponding epidemic prevention measures.