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 during the use of the 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. "