Facebook innovater Mark Zuckerberg taught himself Mandarin inspired by his wife, Priscilla Chan. As stated in the Business Insider site that Zuckerberg was good enough to speak for half an hour at a conference at the "Tsinghua" University in China. That was good enough to make jokes in that meeting. As reported in the Business Insider site that Zuckerberg spoke about Internet.org, innovation, and founding Facebook.
Here is the link to the Business Insider site: Here