Legal analysis: The specific method is that after the trademark expires, you can entrust a trademark agency registered with the Trademark Office to handle the matter or go directly to the trademark registration hall of the Trademark Office to handle the trademark renewal business. Specifically, you need to prepare application documents, submit application documents, and pay renewal fees.

Legal basis: Article 40 of the Trademark Law of the People's Republic of China. If a registered trademark expires and needs to be continued to be used, the trademark registrant shall comply with the regulations within twelve months before expiration. Go through the renewal procedures; if you fail to do so during this period, you can be given a six-month extension period. Each renewal of registration is valid for ten years, starting from the day after the expiration of the previous term of validity of the trademark. If renewal procedures are not completed upon expiration, the registered trademark will be cancelled. The Trademark Office shall announce the renewal of registered trademarks.