Facebook's Zuckerberg starts China visit

In this May, 26, 2010 file photo, Facebook CEO Mark Zuckerberg talks about the social network site's new privacy settings in Palo Alto, Calif. (AP Photo/Marcio Jose Sanchez)

December 20, 2010 5:35:51 AM PST
Facebook co-founder and CEO Mark Zuckerberg started a visit to China on Monday with a tour of the offices of the country's top search engine, while his own social networking site remained blocked on the mainland.