Gonna be a bit of a douche, but... Why do we go googoogaga over an English speaker learning a foreign language to a competent level, when this is something millions of people do regularly? Mark isn't the first person to learn a language in the middle of a busy job and life schedule. Doucheness not quite over - it's a big achievement, yeah, but Chinese isn't actually that hard, it's a bit of a myth perpetuated because…
No one cares if a Chinese CEO (or anyone for that matter) speaks English, no matter the difficulty and effort the learning entails. Contrast this indifference with the flattery of the converse in this thread, and it's quite illuminating of the world we live in.