Is there a number of national patents for postgraduate entrance examination?

It depends on whether your patent is related to the major you are applying for, and it must also be novel and creative. If it's just a general statement, even if it's not related to the major, it's useless at all If it is an invention patent, it depends on whether the tutor is interested. For example, whether it is related to his research topic or whether the research direction is the same. (The utility model has not passed the actual examination, so it cannot explain the level of patent. )