I'm not even sure that is true now, but if everyone currently running XP in China moves over to Ubuntu, that's guaranteed to not to be true very, very quickly.
I'm not, and I use Ubuntu. I'd love a good tutorial to start learning about it.
1) Don’t install anything other than via official channels/Ubuntu store or whatever else you trust, like Steam. More importantly, don’t add random PPAs from some guy on the Internet.
2) Boycott Firefox until they get their sandboxing act together. Use Chromium/Webkit2 browsers. Disable Java applets/WS.