Chapter 6 of the Trademark Law
Article 49
In the process of using the registered trademark, the trademark registrant may change the registered trademark or the name of the registrant on his own initiative , address or other registration information, the local industrial and commercial administrative department shall order it to make corrections within a time limit; if it fails to make corrections within the time limit, the Trademark Office shall cancel its registered trademark.
If a registered trademark becomes the common name of the goods approved for use or is not used for three consecutive years without justifiable reasons, any unit or individual may apply to the Trademark Office to cancel the registered trademark. The Trademark Office shall make a decision within nine months from the date of receipt of the application. If there are special circumstances that require an extension, it can be extended for three months with the approval of the industrial and commercial administration department of the State Council.