Just choose which country you want and click the button. Pick whichever location is closest to you, or actually closest to where the content or service you are reaching sits -- for most people that is the same thing, but it is not always, and the account works the same regardless of which one you choose.
A Trojan implementation that adds WebSocket transport, connection multiplexing and optional Shadowsocks-style obfuscation on top of the original design. This is the variant to reach for when plain Trojan on 443 stops getting through.
