There is no way to manually remove a city from a trip code.

There is no way to manually remove a city from a travel code. The travel code is only recorded for 14 days, which means that the passenger will be recorded as having traveled to the city in the past 14 days, and after 14 days, the system will automatically remove the city from the previous trip.

Travel code

Communication big data travel card, commonly known as "travel code". It is a free query service for 1.6 billion cell phone users across the country, which was launched on March 6, 2020, by the China Academy of Information and Communications Technology (CAICT) in conjunction with China Telecom, China Mobile, China Unicom and the three basic telecom companies, using cell phone "signaling data" obtained through the location of the base station where the user's cell phone is located.

Mobile phone users can use the service to inquire about all the cities and municipalities they have visited in the previous 14 days. on March 30, 2021, the national government service platform "epidemic prevention and health code" has integrated the "communications big data trip card" related information, which can show the user, whether they have been to the health code, and whether they have visited the city. The health code shows whether the user has traveled to high-risk areas and other trip information, helping the health code "a code pass".

According to the relevant requirements of the State Council's Joint Prevention and Control Mechanism Comprehensive Group, the service of "communication itinerary card" was formally taken offline at 0:00 on December 13, 2022, and the China Academy of Information and Communications Technology (CICT) has synchronized the deletion of all the data related to the itinerary card according to the relevant laws and regulations, so as to effectively safeguard the security of personal information.