Why is Dada invoice an information service fee?

Dada invoice is an information service fee, which is generated by contacting other information service companies with communication lines. Information service fee invoice is the charge for providing information service. Explain that a company has an information service center, which can publish information for various enterprises and collect service fees. Information service fee: refers to the fee for contacting other information service companies through communication lines. As for the cost, you can contact the communication service department to find out the specific expenditure.