Duyan County has been established in Yancheng since the fourth year of Yuanshou in the Western Han Dynasty (BC 1 19). At that time, salt pavilions and salt rivers were everywhere, and "blasphemy" was the river that transported salt. In AD 7 (AD 4 1 1), the Eastern Jin Emperor Yi was renamed Yancheng County, which was named after the "salt field around the city". After more than two thousand years of historical precipitation, Yancheng exudes a strong sea salt culture everywhere. In ancient times, it was famous for its rich "Huai salt", which was called "the land with a bosom" in ancient times. As early as the Warring States period, there was a saying that "cooking the sea is salt", and "Historical Records" contained "the East China Sea is free of sea salt". During the Qin and Han dynasties, "cooking the sea for profit and crossing the canal for transportation" has become a prosperous place for fishing and salt. In the Tang Dynasty, there were only "123 salt pavilions" in Yancheng, Huainan Salt Field, which was "rich in the southeast and half out of the border". During the reign of Tang Baoying, there were Hailing Supervisor and Yancheng Supervisor, who cooked more than one million mangokus of salt every year. At that time, Yancheng had become an important salt production center in the southeast coast.

Yancheng is a veritable salt capital. Among the place names in various places, there are some names related to the production and operation of salt industry, such as Tuan, Zao, Zong, Tu and Cang. "Tuan" is a production form of "mining and frying" by production organizations in salt areas and kitchen households. Each saltworks has several regiments, and each regiment has several cooks. In the old days, the regiments were mostly distributed in Dongtai and Dafeng in the ancient Huainan salt area, such as Nantuan, Xituan and Biantuan. At present, there are still 18 villages and 48 natural village groups in Xituan Town, Dafeng. "Stove" is an important facility for people to fry salt. China has six towns, including Touzao, Sanzao and Sizao, and 85 villages and 368 natural village groups are also named after "Zao". "General" is the unit where the people of Yanchang live together. In the early Ming Dynasty, there was a large-scale "Hongwu exile", and immigrants came to the desert seashore to burn salt. In order to manage the cooks scattered along the coast, several places are in good order. During Jiaqing period of Qing Dynasty, there were 30 general managers in Dongtai Fuan Salt Field. Today, the names of coastal towns and villages still retain the names of "general", "general" and "general", and there are 7 villages and 37 natural village groups in China named after "general". "Cang", that is, salt storage, was once the temporary storage place of saltworks in Biancang Town, tinghu district, which is famous for dead peony. There is also Sancang Town in Dongtai, and the 1 1 village and 18 natural village group named after "Cang". Tuo is one of the main production tools for cooking salt in the late Ming and early Qing dynasties. Similar to an iron pot, slightly shallower than a pot, with a diameter of three feet and a depth of 3-4 inches. The towns and villages named after "Tuo" in China include Caotuo Town in Dongtai and Pantuo Town in Dafeng. There are also 6 villages and 13 natural village groups in the city with "Tuo" as the place name.