2. There is no need to mark the patent number. If the mark is incorrect, the administrative department for patent work may require it to make corrections within a time limit. Unless the label is wrong, which constitutes an act of impersonating a patent, it will involve punishment.
3. When marking a patent, it is necessary to confirm the legal status of the patent, and it must be in an authorized state before it can be marked as a patent. If the application is not authorized, it must be marked as a patent application.