The period of validity of a registered trademark is 10 year. Where it is necessary to continue to use a registered trademark after its expiration, it shall apply for renewal of registration within 6 months before its expiration. If the application cannot be submitted during this period, there will be a grace period of 6 months. If no application is filed within the grace period, the Trademark Office will revoke it after the expiration. Renewal, that is, 6 months before the expiration of the trademark and 6 months after the expiration; Grace period can be understood as "grace period extension", that is, 6 months after the trademark expires; The renewal period includes a grace period.