What's the matter that the travel card that communicates big data can't find travel information?

Unicom's mobile phone number can be queried by SMS. Just edit the short message "CXMYD" and send it to 100 10. If you can't receive a reply message temporarily after sending a short message in this way, it may be because there are too many requests from users all over the country in a short time, which has caused a certain amount of short message congestion. I suggest you wait a while before trying to get it.