Jiangsu (formerly romanised as Kiangsu), is an eastern-central coastal province of the People's Republic of China. It is one of the leading provinces in finance, education, technology and tourism, with its capital in Nanjing. Jiangsu is the third smallest, but the fifth most populous and the most densely populated of the 23 provinces of the People's Republic of China. Jiangsu has the highest GDP per capita of Chinese provinces and second-highest GDP of Chinese provinces, after Guangdong. Jiangsu borders Shandong in the north, Anhui to the west, and Zhejiang and Shanghai to the south. Jiangsu has a coastline of over 1,000 kilometres (620 mi) along the Yellow Sea, and the Yangtze River passes through the southern part of the province.
Since the Sui and Tang dynasties, Jiangsu has been a national economic and commercial center, partly due to the construction of Grand Canal. Cities such as Nanjing, Suzhou, Wuxi, Changzhou and Shanghai (separated from Jiangsu in 1927) are all major Chinese economic hubs. Since the initiation of economic reforms in 1990, Jiangsu has become a focal point for economic development. It is widely regarded as China's most developed province measured by its Human Development Index (HDI).
Jiangsu is home to many of the world's leading exporters of electronic equipment, chemicals and textiles. It has also been China's largest recipient of foreign direct investment since 2006. Its 2014 nominal GDP was more than 1 trillion US dollars, which is the sixth-highest of all country subdivisions.