The reexamination of the rejection of an application for invalidation of a trademark shall be made within 15 days after the rejection. Where the registration is obtained by deception or other improper means, the Trademark Office shall declare the registered trademark invalid; Other units or individuals may request the Trademark Review and Adjudication Board to declare the registered trademark invalid. If the parties are still dissatisfied with the results of the review, they can also bring a lawsuit to the court. Legal basis: Article 50 of the Trademark Law of People's Republic of China (PRC). Where a registered trademark is revoked, declared invalid or not renewed upon expiration, the Trademark Office shall not approve the same or similar trademark registration application within one year from the date of revocation, invalidation or cancellation.