The principal's signature and official seal are the official seals of the school. Issue diplomas and degree certificates in the name of the school. This is true as long as it is an undergraduate course in an ordinary university that has passed the college entrance examination.

If you are admitted to a school's continuing education college through self-taught examination or self-taught examination, the graduation certificate and degree certificate are both issued by the continuing education college, with the official seal of the college, the name of the college, the signature of the dean of the college, and the words self-taught examination are marked on the certificate, the gold content will be much lower.