Is it illegal to rent a fixed line to others to use SMS?

It is illegal, because the landline is also a number resource in China, which requires real-name registration to ensure that I register and use it. Now there is a situation that the registered company is different from the actual user, which is not allowed. Because the landline is applied by the company to the operator, it is used for normal business communication of the company and cannot be borrowed. Users can complain to the Ministry of Industry and Information Technology