China postal tail number problem

Hello, there are two main possibilities.

One is that the SMS business previously bound to the last mobile phone number you bought is transferred to this new mobile phone number, so that you will still receive his SMS.

Another possibility is that yours is a one-card discount, not necessarily the tail number of the postal currency card, but also the tail number of the passbook. Sometimes there will be an account alias or suffix XXX in the short message. The account alias is given by the short message processing window. If the amount in the SMS is the same as your own, it means your SMS service.