Haiyan county is one of the birthplaces of Songze culture. More than 5,000 years ago, our ancestors engaged in agriculture, animal husbandry, fishing and hunting. In the twenty-fifth year of King Qin (222 BC), the county was founded. Named after "the seashore is widely rejected, and the Yantian is relatively". Since the founding of the county, Haiyan has moved to the county four times and analyzed the territory six times. At the end of Qin Dynasty, the county fell into the lake (Huzhe Lake) and moved to Wuyuan Township (now outside the East Gate of pinghu city). In Yongjian (126- 13 1) in the Eastern Han Dynasty, the county government fell into the lake (Danghu) and moved south to the hillside of Qijing Township. From five to eight years of Jian 'an (200-203), the southwest of Haiyan was transferred from the south to Haichang County (now Haining City). In the seventh year of Jin Xiankang (34 1), the county magistrate moved to Emma. Southern Liang was imprisoned for six years (507 years), and the county seat is located in the northeast of the county. From the sixth year of Liang Zhong Datong (534) to the first year of Datong (535), the northeast of the county was located in Xupu County. In the fifth year of Tang Kaiyuan (7 17), he moved to the county to govern this place. In the tenth year of Tianbao (75 1), Huating County was located in the north of cutting Haiyan, in the east of Jiaxing and in the south of Kunshan. Yuanyuan Zhenyuan (1295) was promoted to Haiyan House. In the second year of Hongwu in Ming Dynasty (1369), he returned to the county. In the fifth year of Xuande (1430), Pinghu County was established in Wuyuan, Qi Jing, Huating and Dayi. 1May 7, 949, Haiyan was liberated. 1950 in may, three administrative villages in shiling township belonged to haining county, and Pinghu county 10 administrative village belonged to Haiyan county. June1958165438+1October 2 1 Haiyan County was abolished, and the area was merged into Haining County, in which Xitangqiao, Haitang and Tong Yuan were transferred to Pinghu County. 196 1 year1February 15, Haiyan county resumed, and two towns 16 commune were under its jurisdiction. Shiling Township still belongs to Haining County. 1983, the commune was abolished and villages and towns were established. In August, the 1985, Ganpu, Tong Yuan and Xitang Bridges were removed from their townships to build towns. With the development of economy, Yucheng, Baibu and Qinshan all built towns. 1999 adjustment of township administrative divisions, jurisdiction over 9 towns and 3 townships. 200 1, 10, the township administrative divisions were adjusted and optimized again, covering Wuyuan, Shendang, Ganpu, Qinshan, Tong Yuan, Xitang Bridge, Yucheng and Baibu.