The reasons for the cancellation of a registered trademark are as follows: ① If a registered trademark has not been used for three consecutive years, any unit or individual may apply to China National Intellectual Property Administration for cancellation of the registered trademark; (2) The registered trademark becomes the common name of the approved commodity; (3) Where the registered items of a trademark are changed by itself, the first paragraph of Article 49 of the Trademark Law stipulates: "Where a trademark registrant changes its registered trademark, name, address or other registered items by itself in the process of using a registered trademark, the local administrative department for industry and commerce shall order it to make corrections within a time limit; If it fails to make corrections within the time limit, the Trademark Office shall revoke its registered trademark. "