When did Yancheng generally immigrate to Shanghai?

In the 1950s. According to the query of Jianhu Literature and History Network, Yancheng people migrated to Shanghai in 1950, and 7,000 people from Yancheng area migrated to Shanghai, 195 1 9,000 people migrated to Shanghai, 1952,12,000 people migrated to Shanghai,/kloc- Yancheng, also known as Piaocheng, Deng Ying, Baijiang City and Du Yan, is a prefecture-level city under the jurisdiction of Jiangsu Province, a city in the central area of the Yangtze River Delta, and a third-tier city. It is located in the east coast of China, the east of Jiangsu Province, the Yellow Sea in the east, Nantong in the south, Yangzhou and Taizhou in the southwest, Huai 'an in the northwest and Lianyungang in the north.