How is the time for patent examination and approval stipulated? How to speed up patent examination?

As we all know, there are three kinds of patents in China, including invention patents, utility model patents and appearance patents. According to different patent types, the time for patent examination and approval is different. In patent classification, several invention patents have high gold content, so of course, it takes the longest time for an invention patent to examine its three characteristics from application to authorization. However, the technical examination of utility model and appearance patent is generally not as high as that of invention patent and the examination time is short. How long does it take to apply for a patent? Of course, we are not belittling utility model patents and design patents. Of course, there are times when invention patents are not as good as utility model patents and design patents, so the quality of patents cannot be generalized; Patent application has a prescribed examination process, and the procedure of patent examination can directly show the length of patent technology examination; Know the patent examination time from the patent application, acceptance, examination and authorization. The reason why the invention patent is longer than the other two patents in patent examination is that the examination process of invention patent is divided into two stages, namely, the preliminary examination of patent and the substantive examination of patent. The key is that the time for substantive examination is too long, and it takes 2-3 years to apply for a patent certificate. The other two patents were directly completed through the preliminary examination of patents, usually in less than one year. Since the introduction of the relevant policies on patent examination, the examination time of utility model patents has been lengthened and gradually harsh, so it takes a long time, so it takes a year to examine utility model patents. Then the patentee panicked. Is there any way to apply for patented technology urgently to make the patent approval time faster? In fact, there is no way. There is one way to try, but you need certain qualifications to apply, and that is patent priority examination.