How much is the patent extension request fee?

According to the original regulations, the validity period of a patent at the time of application was 1 year, but now 1 is something that the state encourages everyone to apply for a patent. Second, there are too many patents now, and it will take two years to approve them. If it expires long after the acceptance, we will ask for an extension of the request fee, and the local government will reduce it. In fact, it is what has been collected and returned to you, but the form still needs to be done. This is my understanding, not necessarily right, for reference only.