Go to System Preferences and select Network Settings.
Click Advanced and select DNS.
Click the ‘+’ sign and add 220.127.116.11 to the top of the list. Optional: You can add 18.104.22.168 as the second entry in the list.
If you are using IPv6 Click the ‘+’ sign and add 2620:fe::fe
Optional: You can add 2620:fe::9 as a secondary in the list.
Click Ok and then Apply.