Recently, at the project demonstration meeting of the China International Economic Exchange Center's Blockchain + Financing Issues for SMEs, Huang Qifan, deputy director of the China Economic Development Center, said that the most important service scenario of the current blockchain is dual-chain. The first is Industrial chain, supply chain account receivables circulation, bills circulation, clearing settlement circulation, payment and other scenarios; second, the financing and lending scenarios between enterprises and their industrial chains. These two application scenarios are independent and interrelated. The former can provide information for the latter and provide a basis for decision-making for the issuance of loans. The application and development of blockchain is not only a combination of blockchain and finance, but also has a positive and effective role in many other industries.