Why didn't the SMS service fee of China Bank expire?

The Bank of China has been out of use for a long time. If the account is out of money, the bound reserved mobile phone number SMS notification information fee will not be deducted, but the service will be closed.

After the SMS service is launched, Japan will be charged on the signing date from the following month. Annual fee and one-year service fee shall be paid on the signing date from the month after the service is opened, and will not be refunded after deduction. Charge on a monthly basis, according to the signing date from the month after the service is opened, and then deduct the fee on a monthly basis.