1. First file a trademark opposition application with the Trademark Registration Office.

2. Secondly, a trademark has been registered, but the registration is considered invalid and an application for trademark invalidation is filed with the Trademark Registration Office. In the trademark invalidation procedure, evidence is provided to prove that the trademark registration is illegal and violates the provisions of the trademark law.

3. As an applicant for trademark registration rights, but the trademark is no longer needed, file a trademark cancellation application with the Trademark Registration Office.