I wonder if the numbering rules of different universities are the same. Let me give you an example, because I helped the teacher type the graduation certificate and degree certificate at school, so I know a little.

The first five digits are the code of the school; The sixth bit is the certificate type. If it is correct, yours should be 4, which means the certificate is a degree certificate. Seven to ten is your graduation date, such as 2009; The last six places are set by each school, starting from 00000 1, to see how many people in your school can get a degree certificate.

I can tell you that if you want to know the exact number according to the law, it is impossible. Generally speaking, the professional mantissa is similar, but it is hard to say who is in front and who is behind. It may be arranged according to pinyin (Ann is the first one in our major) or it may be the student number.