2. If the patent is invalid, it is also when you defend the patent right of the suspected infringer (such as administrative investigation and court prosecution), the suspected infringer will declare your patent invalid as a non-infringement defense.
3. The "patent stability" referred to in Article 1 has two meanings: Article 1 is of course that the patent is valid, that is, the patent certificate is available and the annual patent fee is paid on time; Second, your patent is difficult or certainly not invalid. Therefore, if you want to sue others for patent infringement, you must provide a "patent evaluation report" to the court.
Therefore, in view of your current situation, you can start from the following aspects: 1, complain through Taobao; Please ask the National Patent Office to issue a "patent evaluation report" for your own patent, and judge whether your patent right is stable according to the conclusion of this report. If the report says that the patent is not novel or creative, it means that the patent right is unstable, and you don't need to continue to think that others have infringed your patent right.