The National Development and Reform Commission and two other departments issued a notice on the issuance of the "National Data Infrastructure Construction Guidelines." Build a base for data circulation and utilization facilities according to unified directory identification, unified identity registration, and unified interface requirements. Establish a nationwide integrated distributed data directory covering government, industry, enterprises, and other entities, as well as national, provincial, municipal, and county levels, forming a national data "ledger" to support the orderly circulation and shared application of data across levels, regions, systems, departments, and businesses. Establish a nationwide integrated distributed digital identity system, standardize identity identification generation, identity registration, and certification mechanisms. Establish a unified data asset voucher, trade voucher structure, generation and verification mechanism, supporting the use of blockchain, encryption technology, Asia Vets contracts, and other means to improve the traceability and trustworthiness of vouchers. Build standardized and regulated interaction interfaces to achieve interconnectivity of data infrastructure. Build a pervasive data access system to support larger-scale access to data resources, participating entities, and third-party services. Establish a data identification system compatible with network identifiers such as IPV6. Establish a data directory classification and hierarchical management mechanism to strengthen data classification management and hierarchical protection.