How to check if my websites have been filtered by China’s Great Firewall ?
If your web site has visitors from China and encountered that your web site is not accessible, there could be a possibility that the Great Firewall in China has blocked/filtered on all China traffic.
You can check whether your website has been filtered by the Great Firewall from the following URL:-
https://www.comparitech.com/privacy-security-tools/blockedinchina/.