[edit] History of Jiang su

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During the earliest Chinese dynasties, the area in what is now Jiangsu was far removed from the center of Chinese civilization, which was in the northwest Henan; it was home of the Huai Yi (淮夷), an ancient ethnic group. During the Zhou Dynasty more contact was made, and eventually the state of Wu (centered at Gusu, now Suzhou) appeared as a vassal to the Zhou Dynasty in south Jiangsu, one of the many hundreds of states that existed across northern and central China at that time. Near the end of the Spring and Autumn Period, Wu became a great power under King Helu of Wu, and was able to defeat in 484 BC the state of Qi, a major power in the north in modern-day Shandong province, and contest for the position of overlord over all states of China. The state of Wu was subjugated in 473 BC by the state of Yue, another state that had emerged to the south in modern-day Zhejiang province. Yue was in turn subjugated by the powerful state of Chu from the west in 333 BC. Eventually the state of Qin swept away all the other states, and established China as a unified nation in 221 BC.
Under the reign of the Han Dynasty (206 BC to 220 AD), which brought China to its first golden age, Jiangsu was a relative backwater, far removed from the centers of civilization in the North China Plain. Jiangsu was at that time administered under two zhou (provinces): Xuzhou Province in the north, and Yangzhou Province in the south. Although south Jiangsu was eventually the base for the kingdom of Wu (one of the Three Kingdoms from 222 to 280), it did not become significant role until the invasion of northern nomads during the Western Jin Dynasty, starting from the fourth century. As northern nomadic groups established kingdoms across the north, ethnic Han Chinese aristocracy fled southwards and set up a refugee Eastern Jin Dynasty in 317, in Jiankang (modern day Nanjing). From then until 581 (a period known as the Southern and Northern Dynasties), Nanjing in south Jiangsu was the base of four more ethnic Han Chinese dynasties facing off with northern barbarian (but increasingly sinicized) dynasties. In the meantime, north Jiangsu was a buffer of sorts between north and south; it initially started as a part of southern dynasties, but as northern dynasties gained more ground, it became part of northern dynasties.