Where did Yancheng, Jiangsu, move from in history?

Yancheng was land in ancient times, and then the land subsided and became a coastal plain. After the founding of the People's Republic of China, fossils of ancient land creatures unearthed in the West Tuan area of ??Dafeng can be concluded that Yancheng became a land at least 20,000 to 30,000 years ago. The discovery of stone tools and bone tools in the Yangzhai area of ??Funing County shows that as early as 4,000 years ago in the late Neolithic Age, there were traces of primitive tribes living in Yancheng who relied on fishing and hunting. As far back as the early years of the Western Zhou Dynasty, Lu Hou Boqin ordered the Am people to move south. Some Am people stayed in Yancheng and settled in the area along the way. It can be said that they were the early pioneers of Yancheng.