http://77q2gqbqwqmdd4fqng6hywqhhb2qaf7mmeovkuh4yvccyypttsivgnqd.onion/posts/introduction-to-tor-browser.html
Use the ISO 3166 two-character codes to specify countries. For example: ExcludeNodes {cn},{hk},{mo},{by},{ru},{ir} Note that there may not be many nodes in the countries you specify. Also, specifying a unique combination of countries makes you less anonymous, since your requests through the Tor network no longer looks like everyone else’s.