1. Clear the browser cache: sometimes browser cache, plug-ins or malicious software will interfere with trademark access, so you can try to clear the browser cache and visit again.

2. change the browser or device: if you still can't access after clearing the cache, you can try to log in on other devices, such as mobile phones or tablets.

3. Avoid accessing under the public network: there may be security risks under the public network, which may easily lead to the interception of access.

4. Contact the webmaster: If the above methods fail to solve the problem, you can contact the administrator of China Trademark Network and ask for their help.

It should be noted that during the visit to China Trademark Network, it is necessary to be vigilant and avoid entering sensitive information such as personal information or payment password to avoid the risks of fraud or information disclosure.