How many days can I change the health travel itinerary code from Tianjin to Langfang?

From Tianjin to Langfang 14 days, you can change the health travel itinerary code to Langfang.

1. When you travel from your permanent city to another city, the trip code will be updated the next day.

2. The place with the travel code of 14 days will disappear.

3. Stay in the same province and city for more than four hours, and the mobile phone travel itinerary code will be updated.