What do you mean "the trademark is invalid"
depending on the specific situation, there are generally two situations. One is that the use period of a trademark has expired without renewal or extension, and this trademark can be registered by others; The other is rejected because of similarity and similarity in the application process. If someone else registers with the same logo as you, it will be rejected as well. If a trademark is rejected, it may, according to the specific reasons for rejection, apply to the State Trademark Office for reexamination within 15 days after receiving the Notice of Rejection.