There are mainly the following reasons: 1. The trip card screenshot has been cropped.

2, due to cell phone theme settings, resulting in a change in the phone font.

3, other unknown reasons for multiple upload failure.

The trip code is the communication big data trip card, as a record of the travel track credentials, is an important means of epidemic prevention and control, "trip code" can display the user's past 14 days to visit the country (region) and domestic stay of more than 4 hours in the city information, can be used to prove that the person in the past 14 days have not been to the key The information can be used to prove that the person has or has not traveled to the key epidemic areas and countries in the past 14 days. It is generally used in overcrowded environments such as train stations, shopping malls, and so on.