"I'm in Beijing for the China Development Forum, where I'm meeting Chinese leaders from the public and private sectors. It's been a busy trip, but I managed to fit in visits to the Great Wall and the Temple of Heaven -- and I got to practice some Mandarin. Thanks to everyone I met on this trip. I'm looking forward to visiting again soon!", Mark Zuckerberg wrote Monday on Facebook. PHOTO FROM FACEBOOK WEBPAGE OF MARK ZUCKERBERG