into 146 township-level divisions. Defunct – Gangzha District has been promoted to Gangzha Economic Development Zone (Gangzha Jingji Kaifa Qu – ) at the provincial level. History Ancient era Because the coast of the East China Sea is constantly expanding eastward as the Yangtze River adds silt to its delta, the distance between Nantong and the seashore is getting longer than it once was in ancient times. The area that is now Nantong was originally part of the state of Wu during the Spring and Autumn period, which was later conquered by the state of Yue in 473 BC. After yet again being subjected to a new foreign rule by the state of Chu in 334 BC, the inhabitants of present-day Nantong would again experience another regime change during the first unification of China by the state of Qin. Imperial era From the Han dynasty up until the Tang dynasty, what is now called Nantong was a minor city county subordinate to Yangzhou. By AD 958, that city county had already gained sufficient importance for it to be upgraded to an independent prefecture called Tongzhou ("Opening Prefecture", possibly from its position near the mouth of the Yangtze) to be created. The increasing wealth of Yangzhou caused Tongzhou to be once again eclipsed as an administrative center in 1368. When Tongzhou finally regained prefecture status in 1724 during the Qing dynasty, it was renamed to its present name Nantong ("Southern Tong") to avoid confusion with another administrative division also named Tongzhou, located near Beijing. Modern era Nantong was the first place in China to be developed into a modern city after the collapse of the Qing dynasty, and was also the birthplace of China's modern industry. The prosperity of Nantong has traditionally depended on salt production on the nearby seacoast, rice and cotton agriculture, and manufacture of cotton and silk textiles, especially Nantong blue calico. A local statesman and industrialist named Zhang Jian founded Nantong's first modern cotton mills in 1899. He then developed an industrial complex that included flour, oil, and silk reeling mills, a distillery, and a machinery shop. He also founded a shipping line and reclaimed saline agricultural land to the east of Nantong for cotton production. Thanks to these efforts, by 1911 Nantong was commonly called "Zhang Jian's Kingdom". In the early Republican period, the Nantong Special Administrative District included Chongming County, now part of Shanghai. Culture