(1) If you give up your defense after a trademark is declared invalid, you will directly face the risk of the trademark being invalidated. (2) The invalidation defense is a legal right granted to the parties by the Trademark Law, and it is also the only way for the parties to refute the applicant’s opinions to the Trademark Review and Adjudication Board (Article 44 of the Trademark Law: Other units or individuals request the Trademark Review and Adjudication Board to declare the registered trademark invalid After receiving the application, the Trademark Review and Adjudication Board shall notify the relevant parties in writing and submit a defense within a time limit). (3) The Trademark Review and Adjudication Board conducts written hearings on invalidation cases. Failure to respond will undoubtedly increase the other party’s chances of a successful invalidation declaration, and responding will undoubtedly increase our chances of success.