*** 18 months refers to the system in which the owner of a registered trademark goes through certain procedures according to law within ten years before the expiration of the trademark registration period to extend the validity period of his registered trademark. If a registered trademark needs to be used after the expiration of its validity period according to Article 40 of the Trademark Law as amended by 20 13, the trademark registrant shall go through the renewal procedures in accordance with the regulations before the expiration of its validity period 12 months; If it has not been handled during this period, it can be extended for six months. The validity period of each renewal registration is ten years, counting from the day after the last expiration of the trademark. If the renewal formalities are not completed at the expiration of the period, the registered trademark shall be cancelled. There are two ways to apply for the renewal of a registered trademark: (1) entrusting a trademark agency to file with the Trademark Office. (2) The applicant goes directly to the trademark registration hall of the Trademark Office. (3) The applicant applies online through online registration of Chinese trademarks.