Is it illegal for companies such as China Mobile, China Unicom and China Telecom to charge before calling the Internet?

Is it illegal for companies such as China Mobile, China Unicom and China Telecom to charge before calling the Internet?

This is not illegal fund-raising. In fact, there are two ways to pay the communication expenses of communication companies. One way is to pay in advance, that is, pay at the beginning of the month before using communication services. When the fee is used up, the communication service is suspended. The second is the post-payment method, which uses the communication service first and pays at the beginning of the next month, which is suitable for customers with good credit.

So, there are two ways.