I didn't receive the notice of passing the preliminary examination of the invention patent, but it has been published online. What happened?

First, if it is a utility model or a design, there is no notice of preliminary examination.

Second, if it is an invention, it can be released separately, or it can be released in the notice together with the announcement notice.

Third, if the address is wrong or changed, it may not be notified. After receiving the reply, the Patent Office will announce the service and then announce it according to the process.