No need. The price of Baiwang billing system based on document quantity is between a few cents per electronic invoice and 0.5 yuan. Baiwang all-electric invoice only needs to pay a single fee, and no annual fee is required. The "Hundred Nets" service is a national tax-controlled special product sales and technical service system established by the National Information Security Engineering Technology Research Center and entrusted by State Taxation Administration of The People's Republic of China to undertake the technical service guarantee of the VAT tax control system. Services include special VAT invoices, general VAT invoices, goods transportation VAT invoices, unified sales invoices for motor vehicles, general invoices (Beijing, Heilongjiang), general local tax invoices (Jilin) and other related systems and software and hardware applications.