Electronic invoices are the product of the information age. Like ordinary invoices, they are distributed to merchants in the form of unified issuance by the tax bureau. The invoice numbers are distributed to merchants with unified national coding and unified anti-counterfeiting technology. The electronic invoices are attached with the signature mechanism of the electronic tax bureau. 20 12 In mid-May, the National Development and Reform Commission issued the Notice on Organizing the E-commerce Pilot Project of National E-commerce Demonstration Cities. Relevant cities may apply for the construction of e-commerce demonstration cities, and pilot cities may request the promotion of electronic invoices. Only five pilot cities have been approved to carry out electronic invoices, namely Chongqing, Nanjing, Hangzhou, Shenzhen and Qingdao. Issuing electronic invoices will greatly save the cost of invoices and the cost of printing invoices, and it does not include the indirect cost of invoice management. Moreover, the electronic invoice system can be combined with ERP, CRM, SCS and other systems within the enterprise, and the invoice data is fully electronic and centralized, which is helpful to the accounting treatment of the enterprise itself and can provide decision support to the enterprise operators in time.