Legal analysis: About half a year. China's trademark law stipulates that after many circumstances change when registering a trademark and applying for trademark registration, the trademark registrant or applicant shall make an application for change according to law. If the name, address or other registered items of the principal registrant of a registered trademark change, he shall submit an application for change, which is an obligation that the registrant shall perform according to the law.

Legal basis: Trademark Law of the People's Republic of China

Article 22 An applicant for trademark registration shall fill in the category and name of the goods using the trademark according to the prescribed commodity classification table and file an application for registration.

an applicant for trademark registration can apply for registration of the same trademark for multiple categories of goods through one application.

the application for trademark registration and other relevant documents may be submitted in writing or in the form of data messages.

article 28 the trademark office shall, within nine months from the date of receipt of the application documents for trademark registration, complete the examination of the trademark applied for registration, and if it meets the relevant provisions of this law, make a preliminary examination and approval announcement.

Article 4 Where a registered trademark needs to be used continuously after its expiration, the trademark registrant shall go through the renewal procedures in accordance with the regulations within 12 months before the expiration; If it fails to be handled during this period, a six-month extension period may be granted. 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.