China's fast-growing economy has been forecast to overtake the U.S. as the world's biggest economy as early as 2016, but economists say this is unlikely to happen as structural reforms slow the pace of growth and a stronger Chinese yuan dampens exporter competitiveness.

In March, a report by the Organization for Economic Cooperation and Development (OECD) said China was on track for a fourth straight decade of fast growth and will overtake the U.S. as the world's largest economy in 2016, after adjusting for price differences.