File photo of an apartment building near a construction site at residential area of downtown Shanghai

An apartment building is seen near a construction site at residential area of downtown Shanghai in this November 18, 2011 file photo. The global economy is set to expand by a modest 3.3 percent this year as a still-smouldering euro zone debt crisis and a relatively slow U.S. recovery continue to leave Asia as the main driver of growth, Reuters polls showed on April 19, 2012. Asian economies, as well as Latin America, are expected to pick up the pace later this year, driven by monetary stimulus after a soft patch - a boost Western policymakers are increasingly unable to provide. REUTERS/Carlos Barria/Files (CHINA - Tags: BUSINESS CONSTRUCTION REAL ESTATE)