The difference between Yunnan blockchain electronic invoice and digital invoice is that digital invoice is a form of traditional electronic invoice, which refers to invoices issued, verified and managed electronically. The issuance, transmission and storage of digital invoices all depend on Internet technology. In the process of use, the digital electricity bill needs to be certified by the tax bureau before it can take effect. Yunnan blockchain electronic invoice is an electronic invoice based on blockchain technology. Blockchain technology is a decentralized, open and transparent distributed ledger technology with high security and credibility. Based on blockchain technology, the issuance, transmission and storage of electronic invoices in Yunnan blockchain have the characteristics of openness and transparency, anti-counterfeiting and traceability. In the process of use, due to the application of blockchain technology, the authenticity of electronic invoices in Yunnan blockchain is easy to distinguish, and the security and reliability have also been enhanced. Yunnan Province, referred to as "Yun" or "Dian" for short, is one of the 23 provinces in China, located in the southwest of China, with Kunming as its capital. Yunnan Province is the radiation center of China facing South Asia and Southeast Asia, located at the junction of China, Southeast Asia and South Asia, and was selected as the National Pilot Free Trade Zone. It is an important part of the Yangtze River Economic Belt, a popular tourist destination and a major cultural tourism province in China.