1, Xuexin.com query, you can register Xuexin.com account, log in to Xue Xin file, and enter ID number and name for query. The certificate number is 17 digits or 18 digits, which can be found on the graduation certificate.
2. Consulting school. You can contact the archive room, student status management department, school alumni association of graduation high school, or inquire with old classmates and friends.