Article 280 of the Criminal Law clearly stipulates that anyone who forges, alters, buys or sells or steals, seizes or destroys official documents, certificates and seals of state organs shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention, public surveillance or deprivation of political rights; If the circumstances are serious, they shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years.

PS: The most serious consequence of engraving the official seal of a university privately is that you may be sentenced to more than three years and less than ten years in prison.