How to understand the patent authorization announcement date and application announcement date?

If it is an application for a patent for invention, it must go through the publication procedure first, then conduct substantive examination, and meet the requirements of novelty, creativity and practicality for granting a patent right before it can be granted. Therefore, it is possible that the announcement date of the invention patent authorization must be later than the announcement date of the application, or even several years apart. There is no publication system for utility model patents and design patents, and they will be published at the same time when the patent right is granted, so there is no interval between them, and they are on the same day.