Article 49, Paragraph 2 of the Trademark Law stipulates: "If a registered trademark has not been used for three consecutive years without a legitimate reason, any entity or individual may apply to the Trademark Office for the revocation of the registered trademark."

The core purpose of this provision is to clean up "zombie trademarks" and activate trademark resources. However, the definition of "legitimate reason" directly relates to the continuation of trademark rights, and there are many disputes in practice. So, what constitutes a "legitimate reason"?