Jiujiang is a prefecture-level city located on the southern shores of the Yangtze River in northwest Jiangxi Province, China. It is the second-largest prefecture-level city in Jiangxi Province the largest one being Nanchang. Jiujiang literally means "nine rivers." Its population is 4,728,763 inhabitants at the 2010 census whom 545,616 in the built up area made of 2 urban districts. During the Xia through the Shang Dynasties Jiujiang was a capitol of several states. In the Spring & Autumn Period (770-476 BC) Jiujiang bordered between the states of Wu (downstream, to the east) and Chu (upstream, to the west).