Guangdong is a province on the South China Sea coast of the People's Republic of China. The province was previously often written with the alternative English name Kwangtung Province. It surpassed Henan and Sichuan to become the most populous province in China in January 2005, registering 79 million permanent residents and 31 million migrants who lived in the province for at least six months of the year. The provincial capital Guangzhou and economic hub Shenzhen are amongst the most populous and important cities in China. Since 1989 Guangdong has topped the total GDP rankings among all provincial-level divisions, with Jiangsu and Shandong second and third in rank. According to provincial annual preliminary statistics, Guangdong's GDP in 2010 reached CNY 4,550 billion, or USD 689.02 billion, making its economy roughly the same size as that of Turkey or Indonesia. Guangdong has the fourth highest GDP per capita among all provinces of mainland China, after Jiangsu, Zhejiang and Liaoning. The province contributes approximately 12% of the PRC's national economic output, and is home to the production facilities and offices of a wide-ranging set of multinational and Chinese corporations. Guangdong also hosts the largest Import and Export Fair in China called the Canton Fair in Guangdong's capital city Guangzhou.