1. Log on to the national government service platform, and select "the State Council Department Service Window"-"Ministry of Industry and Information Technology"-"Service".
2. In the service page, select "Professional and Technical Personnel Qualification Certificate Inquiry".
3. Enter the name and certificate number on the second-level constructor certificate, and click the "Query" button. The system will display the query results, including certificate name, issuing company, certificate level, certificate number, professional name, acquisition time and other information.