Gelonghui April 26| Nanjing City recently compiled and released a "1+2" series of documents to promote the construction of the city's data infrastructure system. In the "1+2" series of documentsrpgblockchaingame"1" is the "Implementation Opinions on Promoting the Construction of Data Basic Systems to Give Better Play to the Role of Data Elements";"2" is two supporting systems, namely the "Interim Measures for the Management of Public Data Authorization and Operation in Nanjing City" and the "Interim Measures for the Registration of Data Assets in Nanjing City." Among them, the "Implementation Opinions" focus on promoting compliance and efficient circulation and use of data and empowering the real economy. They clarify that by 2025, a data classification and hierarchical security protection system suitable for the big data environment will be established and improved to improve the quantity and quality of data element supply; By 2030, a complete data trusted circulation system will be established, and a new development model for data elements will be comprehensively formed that complies with laws and regulations, opens cooperation, joint participation, each takes what needs, and shares dividends.