Xinhua reprinted an article from Yangcheng Evening News, which reported that the GDP numbers that each province in China reported did not match the GDP number from the central government. For the past several years, the sum of GDPs reported at the provincial level has always been greater than the national number. In 2010, the provincial sum was 3.5 trillion yuan (US$540 billion), or 8.8%, greater than the national number. The report listed the reasons for this inconsistency as double counting, calculation errors, and false claims at the provincial level. “For example, an economic review of the previous two years found significant gaps in some provinces’ GDPs numbers. As a result, those GDP numbers underwent a major correction.”
Source: Xinhua, July 19, 2011
http://news.xinhuanet.com/fortune/2011-07/19/c_121690132.htm