The southwestern municipality of Chongqing led the mainland in competitiveness gains between 2006 and 2010, a government think tank said yesterday.
Anhui province, a major exporter of migrant workers, was the second most improved while top coal producer Shanxi witnessed the biggest regression.
Jiangsu had the most competitive economy on the mainland in 2010 after trailing Shanghai, Guangdong and Beijing in 2006. The four regions topped the competitiveness rankings for all five years.
The Chinese Academy of Social Sciences (CASS) released its 'Report on Overall Competitiveness of China's Provincial Economy During the 11th Five-Year Period' in Beijing yesterday.
Professor Peng Zhenhuai, head of the Local Government Research Institute at Peking University, said Chongqing's recent economic success could partly be attributed to its party chief, Bo Xilai.
'Under the current Chinese political system, Bo's position as a member of the central Politburo has created an advantage for Chongqing's growth,' he said. None of Bo's four predecessors, since Chongqing was made a directly controlled municipality in 1997, were Politburo members at the time.