I received a text message from 10086 when I bought medicine.

Personally, I think it is true, and doubt is a way to promote mobile. First of all, the information sent by 10086 is basically true. In addition, for example, you are using the 10 yuan package. After the upgrade, it will be 20 yuan Package, and every month it will be 20 yuan Package. I'll give you a discount next month, but 20 yuan won't send it. Then you can spend it from 10 yuan to 20 yuan. Mobile will earn you a monthly traffic fee of 10 yuan.

I hope you can understand and adopt it.