Graduation certificate number (electronic registration number) numbering rules: there was no numbering rule before 98, and it was 17 in 2000-2002 and 18 in 2003.

The first 5 digits (school code). The 6-digit number is the school-running type code, and the ordinary higher level is 1. Doctor 2. Master degree 3. Bachelor degree 4. Adult higher education is 5. Higher education self-study examination (such as self-study examination number: starting with 6) and higher education diploma examination are both 6. Online education is 7. 7- 10 digit: certification year. 1 1- 12 digits: training level code: doctoral student 0 1. Graduate 02. Undergraduate 04. Undergraduate 05. Junior college (including higher vocational education) 06, 13- 17 or 18: proofread the serial number of graduation certificate.