A man walks past a closed factory in Wenzhou, Zhejiang province October 17, 2011. China is seeking the extradition of private entrepreneurs who have fled abroad after defaulting on billions of yuan owed to state banks and loan sharks, two independent sources said, a rare move underlining Beijing's concern over the scale of losses. The problems began with private companies in the eastern city of Wenzhou -- famous for its entrepreneurs and speculators -- turning to the underground lending market after Beijing clamped down on credit as part of a campaign against inflation. Picture taken on October 17, 2011. REUTERS/Carlos Barria (CHINA - Tags: POLITICS BUSINESS)