It's actually really simple to change your DNS. Just follow this - https://www.lifewire.com/how-to-change-dns-servers-in-windows-2626242
Use the DNS numbers used in there (8.8.8.8 etc) as they are the google dns servers that will bypass the national firewall.
If you don't want Google monitoring every DNS lookup you make, Quad9 offers an equivalent, free DNS server at 9.9.9.9 . 😉
https://www.internetsociety.org/blog/2018/07/a-deeper-dive-into-public-dns-resolver-quad9/
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