What message should I send when I close the Unicom traffic packet?

If you mean to cancel the number of traffic packets, it also depends on the traffic packets you open. For example, China Unicom's 2G users can send a short message "QXLL" to 100 10 to apply for unsubscribe when they open a 3G provincial traffic package, and the unsubscribe will take effect the following month. 3G users of China Unicom can send a short message "QX3GLL" to 100 10 to apply for unsubscribe, and the unsubscribe will take effect the next month. If this number is for other traffic packages, it is recommended that you call 100 10 for advice on how to cancel.