ZeTo is an open medical information service platform based on EOS blockchain 3.0 technology. ZeTo integrates medical information scattered across different medical institutions, forming a complete personal medical information database. ZeTo returns ownership and control of the information to the user. Users can set or authorize different permissions through the ZeTo system as needed to fully control their medical information. The medical service provider certified by ZeTo system can add new medical information to the user's personal medical file under the authorization of the user, so as to realize the data link, instead of being saved to the database of the medical institution, and integrate the fragmentation information into a complete information database....