How many years' history is Qidong?

Qidong once governed three counties in history. The south is a new sandy land with a history of only 120 years. Historically known as "Waisha", 1928 belonged to Chongming County, Shanghai. The central area belongs to Xiasha, which belonged to Haimen 194 1 years ago. Lvsi area in the north has the longest land-forming time, with a history of more than 1000 years. The Song, Yuan, Ming and Qing Dynasties belonged to Haimen, and before 1942 it belonged to Nantong County. Ma's Prescription for Building a County in Qidong recorded the process of building a county in Qidong in detail. In Qidong, the area around Lvsi in the north is called "Beisha" and the southern and central areas are called "Nansha". "Nansha" and "Beisha" have different languages and customs. Nansha people speak Qihai dialect, which is exactly the same as Haimen dialect, similar to Chongming dialect and Shanghai dialect, belonging to Wu dialect, while "Beisha" people speak "Lvsi dialect". Regarding the origin of the residents of Nansha, the mainstream view is that Jurong moved to Chongming and Chongming moved to Qidong. According to Ming Zhengde's "Chongming County Records", Chongming Island was sparsely populated at the beginning. In 696 (Long live the Tang Dynasty), there were six surnames on the island, namely Huang, Gu, Dong, Shi, Lu and Song, mostly from Jurong, Jiangsu. 1025 (in the third year of Song Tiansheng), Chongming was a new sandy land, inhabited by Yao and Liu, named Yao. 110/year (Song Jianzhong, Jing Guoyuan), Sansha rose because "there are fish and salt, and folk music lives there." Jurong people Zhu, Chen and Zhang all came to live here. During the Guangxu period of the Qing Dynasty, more than a dozen sandbars of different sizes rose one after another in the northeast river course of Chongming Island, so residents from other places, especially those from Chongming and Haimen, moved one after another, reclaimed land for reclamation and thrived. These sand people are the earliest residents in the south of Qidong, and most of them are tenants of Chongming landlords. It can be inferred that the statement that Nansha residents originated from Jurong in the south of the Yangtze River and moved from Chongming is extremely credible. But in modern times, most residents of Nansha came from Huzhou, Jiaxing, Zhejiang. He was a native of Jiangnan in northern Zhejiang, and moved northward to escape the war during the Taiping Heavenly Kingdom. At present, the folk culture in the sandy land of the Yangtze River estuary is very similar to that in northern Zhejiang. Interestingly, the residents in the southern sandy land of Qidong often subconsciously pretend to be Jiangnan people. They obviously live in Jiangbei, but they still cling to many habits in Jiangnan. Actually, outsiders are called "Jiangbei people" and what they don't understand is called "Jiangbei dialect". This just proves from one side that the residents of Nansha originated from the south of the Yangtze River. As for the "Beisha" residents in Lvsi area in the north of Qidong, they are complex immigrants with a long history. "Beisha" is the earliest mature sandy land in Qidong and the "Dongbuzhou" where the Yangtze River enters the sea. In the Tang Dynasty, Lv Si became a saltern. According to historical records, the early residents here were "immigrants" who were exiled to Hudouzhou to cook salt for a living. Of course, there are many fishermen from all over the world. It is difficult to verify where its residents actually come from. But linguists believe that Lusi dialect is an ancient Changzhou dialect. Therefore, Lvsi dialect is classified as an adjacent piece of Wu dialect. Judging from the law of human migration, population migration is always inseparable from physical geography, administrative orders, different settings and social economy. In Lvsi, there is a folk legend: On August 13th, the eighth year of Hongwu in Ming Dynasty, a tsunami occurred in Lvsi area, and 30,000 people drowned. So the imperial court decreed that the surnames of Du, Lu, Ji, Zhou, Mao, Peng were taken out from (now Changshu) and the family moved to Lvsi with their ancestors and never returned to the original. So there are so many surnames in the native place of Lvsi area, and the rest are Hakkas who moved later.