The full name of the DAY protocol is Data Storage Traceability Contract, which is an ecological landing application plan heavily developed by the DAY Foundation. The world's leading new ecosystem of data storage and product traceability services, created by numerous top blockchain technology and financial experts from around the world through "blockchain+intelligence" technology. The DAY protocol, combined with DeFi's decentralized financial restructuring of the public chain economy model, enables the implementation of relevant commercial finance, and uses decentralized storage and traceability technology to achieve user data authentication and privacy protection. The DAY protocol is driven by decentralized commercial finance, using industry landing as a booster to achieve a close integration of online digital economy and physical industry....