According to the provisions of Article 38 of China's current Trademark Law, how long is the trademark renewal period: "If a registered trademark needs to continue to be used after its expiration, it shall apply for renewal of registration within 12 months before its expiration. If no application is made during this period, a grace period of 6 months may be granted. If no application is made at the expiration of the exhibition period, its registered trademark shall be cancelled. According to Article 46 of the Trademark Law, if a registered trademark is revoked or not renewed upon expiration, the Trademark Office shall not approve the application for trademark registration that is identical or similar to the trademark within one year from the date of revocation or cancellation. Through the above introduction, China's trademark renewal is the legal time limit stipulated in the Trademark Law. The trademark will be renewed for 6 months before it expires, and a * * * means 18 months. If you don't go through the formalities within the renewal period of 18 months, your trademark will be cancelled. If it takes longer to re-register a trademark than to renew it. But also caused irreparable losses, so the trademark owner must grasp the renewal period.