China Postal Information Office sent me a short message that the free trial period of your account will expire on the 5th. What does the front desk service mean here? Can you cancel it?

If it is 1 1 185, the account change notification SMS service has expired. Free trial in the first month and charge in the second month. Generally, the subscription starts in one year, with a monthly fee of 2.50 yuan and an annual fee of 30 yuan. If you don't use it, you can cancel it, because if you don't cancel it, you will be charged 30 yuan the next month.