This is more a reminder to avoid dns leaks in your linux systems browsing through VPNs in those countries with internet censorship.
Dns leak poses a serious issue, it allows the local isp access to your traffic and the censored domains will be blocked even though you’re connected to a VPN.
Fix:
Use OpenDNS servers:
208.67.222.222
208.67.220.220
https://www.opendns.com/