How to determine the termination date of patent right?

If the annual patent fee has not been paid or the annual patent fee and late payment fee have been paid in full, a notice of patent termination shall be issued within two months from the date of expiration of the annual patent fee, which shall not be earlier than 1 month, and the patentee shall be notified. Where the patentee fails to start the recovery procedure or the recovery is not approved, it shall register and announce it in the patent register and patent announcement respectively four months after the termination notice is issued. After that, the patent application file is stored in the invalid file database. The expiration date of the patent right is the expiration date of the previous year. In reality, if there is a situation that leads to the termination of the patent right, it will undoubtedly have a great impact on the patentee. It means that you can no longer enjoy patent-related rights. Of course, if you are dissatisfied with the termination of the patent right, you can also appeal within the specified time.