Trademarks and advertising slogans are valid for 10 years from the date of application, and the validity period after each renewal is also 10 years. The application for renewal should be submitted within the 6-month extension period before the registered trademark expires or within the 6-month extension period after the expiration, otherwise the registration will become invalid. When submitting an application for renewal, proof that the trademark has been used continuously for at least three years during the registration validity period and proof that the renewal fee has been paid should be attached. If the same trademark registration protects two or more categories of products or services, the renewal only needs to be carried out in one of the categories and relevant fees must be paid.