If you get a patent certificate, it will take half a year at the earliest, and the exact time is hard to say. If you want to get authorization as soon as possible, you must check "Apply for disclosure in advance" and "Apply for substantive examination in advance" in the request, because according to the patent law, it takes 18 months for an invention patent to be disclosed, and it takes 36 months from application to substantive examination.
In addition, in order to authorize as soon as possible, patent documents must be written in strict accordance with the provisions of the Patent Law and its detailed rules for implementation, so as to shorten the actual examination process. Even in rare cases, the examiner will directly authorize without issuing a notice of examination opinions.