The validity period of a well-known trademark is the same as that of an ordinary trademark. The registered service life of a trademark is 10 years, and it can be renewed after 10 years, and each renewal time is ten years. Article 40 of the Trademark Law: If a registered trademark needs to be used continuously after the expiration of its term of validity, the trademark registrant shall go through the renewal procedures in accordance with the regulations within 12 months before the expiration; 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. The Trademark Office shall announce the renewed registered trademark.

Legal objectivity:

Article 39 of the Trademark Law of People's Republic of China (PRC) shall be valid for ten years, counting from the date of approval of registration. Where the registered trademark of Article 40 of the Trademark Law of People's Republic of China (PRC) needs to continue to be used after the expiration of the term of validity, the trademark registrant shall go through the renewal procedures in accordance with the regulations within 12 months before the expiration; 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. The Trademark Office shall announce the renewed registered trademark. Article 41 of the Trademark Law of People's Republic of China (PRC) where a registered trademark needs to change the name, address or other registered items of the registrant, an application for change shall be filed.