There is no reason shown on the itinerary card.

Because the user's network signal is not good, the trip code may not be displayed.

Recently, many friends who want to go home say that they can't find their travel cards, and they can't solve it by calling their mobile phones. They will go home by train soon, and nucleic acid can't do it. What should I do?

My mobile friends around me have also encountered this problem. After communicating with 10086 customer service, I found that I made two calls that day, with an interval of more than 4 hours, and both of them needed to be before 8 pm. According to this method, two more calls were made the next day, and the itinerary card finally turned green on the third day. Unsuccessful babies can confirm whether the call interval is enough for 4 hours and whether it is at 8 pm.