[SpaceManNabs]

I don't know why people keep saying that this is very impressive unless he was learning Chinese as he was also running Facebook. His tones and grammar still need a good amount of work. I feel like I am not getting the impact since I go to a university were 15% (very rough estimate) of the student body take four years of Chinese in about 2 years (all languages are compressed to 2 years at Princeton).

edit: After reading more comments, I understand that it is rare, but I can't say it is a much more significant achievement than if he learned another language such as German or Arabic.

[ericglyman]

It's because he was learning Chinese as he was running Facebook. He just started just a few years ago http://www.news.com.au/technology/facebook-founder-mark-zuck...

[mliker]

It's impressive because he's successfully steering his company and picking up an incredibly difficult language for Native English speakers.