Will the patent be notified to file a case if it fails the preliminary examination?

No. Patent pre-examination refers to the pre-examination service of patent application. Before the patent is formally submitted to China National Intellectual Property Administration, the protection center pre-examines the application documents, so that qualified patent applications can enter the fast examination channel. It is a part of the fast examination of patents implemented in China National Intellectual Property Administration. If the patent pre-examination fails, no notice will be given, and the applicant can inquire within the authorization period.