1. Analyze the reasons, check the application for trademark invalidation, analyze the applicant’s reasons and evidence for invalidation, and submit written defense reasons and corresponding evidence materials. If the respondent does not understand the trademark invalidation declaration, it is recommended to seek help from a trademark agency in a timely manner. 2. Prepare defense materials and evidence. It is recommended that the respondent place and bind the defense documents in the following order. The specific list of invalidation defense materials is as follows: (in duplicate) 1. "Invalidation Defense Defense"; 2. Contents of defense materials; 3. ."Letter of Power of Attorney for Trademark Agency"; (If you entrust an agency to handle the matter, you need to prepare it, but you don't need to prepare it if you handle it by yourself) 4. Copies of the preliminary dispute announcement page and registration announcement page; 5. Evidence catalog and evidence materials; 6. Invalidity of the Trademark Commission The original copy of the declaration notice and the envelope to which the Trademark Review and Adjudication Board sent the invalidation notice. Note: If the respondent needs to have supplementary evidence materials after filing a defense for invalidation, he should state it in the defense and submit it within 3 months from the date of submission of the defense; failure to submit the supplementary evidence after the expiration of the period will be deemed to have given up the supplementary evidence. . 3. Submit defense documents to the Trademark Review and Adjudication Board. The respondent must submit a written defense document and corresponding evidence to the Trademark Office within 30 days from the date of receipt of the invalidation defense notice and a copy of the invalidation application. 4. The Trademark Review and Adjudication Board makes a ruling. After listening to the statements of the parties and reviewing relevant evidence, the Trademark Review and Adjudication Board will make a decision to maintain the registered trademark or declare it invalid. If the party concerned is dissatisfied with the Trademark Review and Adjudication Board's ruling, he or she may file a lawsuit in the People's Court within 30 days from the date of receipt of the notice.