1. Find evidence that you have used a registered trademark in the past three years. The evidence materials must have the logo of the applied trademark and be able to show the user of the applied trademark, etc. 2. Find evidence that the trademark registrant permits others to use the registered trademark. If the licensee uses the trademark, it can also be regarded as using the trademark, but it must clearly reflect the licensing relationship between the trademark registrant and the licensee. . 3. Find out the legitimate reasons why the trademark registrant has not used the trademark for three consecutive years. If a trademark has not been used for three years due to force majeure, it can be allowed to continue to be used as a legitimate reason.