Ruian is an ancient city in Dongou. As early as the late Neolithic Age, ancestors had multiplied and established settlements on both sides of the lower reaches of the Feiyun River. Xia, Shang, Western Zhou , Spring and Autumn Period were the territory of Yangzhou . Subsequently, due to changes in the current situation, changes in dynasties, and turbulent changes in administrative affiliations, it was not until the second year of Wu Chiwu in the Three Kingdoms (AD 239) that the county government was established. It has a long history of more than 1,750 years.
In the second year of Wu Chiwu of the Three Kingdoms (239), Luoyang County was established on the southern border of Daluoshan (Quanshan) in Yongning County, which belonged to Kuaiji County . The county was established in Beihu Lu'ao (in the area of Xi'ao and Hedaiqiao), and was built for Rui'an. The beginning of the county. In the first year of Taikang in the Western Jin Dynasty (280), Anyang County was changed to Angu County. In the first year of Taining in the Eastern Jin Dynasty (323), Angu County was moved to Shaogong Island. In the ninth year of Emperor Kaihuang's reign in the Sui Dynasty (589), Hengyang from the province entered Angu County and became part of the county. In the twelfth year of Kaihuang's reign (592), Angu County of the province was merged into Yongjia County. In the second year of Tianfu of Tang Dynasty (902, the third year of Yizuotianfu), Angu County was changed to Ruian County. In the first year of Xianchun of the Southern Song Dynasty (1265), Wenzhou was changed to Ruian Prefecture, and Ruian County was unified. In the 13th year of Yuan Dynasty (1276), Liangzhe East Road was changed to Jianghuai Province, and Ruian Prefecture was changed to Wenzhou Road, which belonged to the county. In the first year of Yuanzhen (1295), more than 50,000 households in Ruian County were promoted to prefecture. In the second year of Hongwu in the Ming Dynasty, Ruian Prefecture was reduced to a county. In the third year of Emperor Jingtai's reign (1452), Taishun County was established, and 5 capitals and 12 miles away from Yixiang Township, Ruian, belonged to it. In the 35th year of the Republic of China, Wencheng County was established, and 10 townships in western Ruian, including Daxi, Longfeng, Jinzhang and Yikou, belonged to it.
On May 10, 1949, Ruian was liberated; on May 14, the Preparatory Committee of the Ruian County People's Government was established; on September 5, the Ruian County People's Government was officially established. On April 15, 1987 (the State Council document was issued on April 15, and a celebration meeting was held on July 1 for the establishment of a county and a city, and the city adopted a new seal on that day) the county was established as a city (county level), and the Ruian Municipal People's Government was established, with jurisdiction constant. In 2001, Xianyan Town and Li'ao Town were classified as Ouhai District, Wenzhou City, and the Meitou Office of Tangxia Town was classified as Longwan District, Wenzhou City.
