Haining began to be inhabited as early as the New Stone Age some 6,000 years ago. During the Spring and Autumn period (770-476BC), it became part of the State of the Wu and then belonged to the State of the Yue before coming under the State of the Chu. In 221BC, during the Qin dynasty, it fell under the jurisdiction of Changshui County (present-day Jiaxing). In 223AD, or the second year of the reign of Wu State King Huangwu of the Three Kingdoms period, it became known as Yanguan County. In 1295, or the first year of the reign of Yuan Emperor Yuanzheng, the county was promoted to be Yuanguan Prefecture. It became Haining Prefecture in 558. As the sea often encroached upon the prefecture via the Qiantangjiang River, the area was renamed Haining Prefecture in 1329 in the hope of calming the waves (in Chinese, "hai" means sea and "ning" to calm or pacify), and it remains so today. In May 1949, Haining County was occupied by the Communist Army. In June 1949, the county government was relocated to Xiashi Town. In October 1958,
Haiyan County was merged into Haining. In December 1961, Haiyan County was re-established. In November 1986, Haining County was elevated to Haining City, under jurisdiction of Jiaxing. Throughout history, Yanguan Town had long served as the seat of county government. During the
Second Sino-Japanese War, the county seat was moved to Yuanhua Town and even outside the county. After the war, the county government was formed in Xiashi Town. File:Haining circa 1765.jpg | Haining File:Nanguanxiang-Haining 01.JPG File:Nanguanxiang-Haining 02.jpg File:Nanguanxiang-Haining 03.jpg File:Nanguanxiang-Haining 04.jpg ==Administrative divisions==