Which province does Jiangyin in Changzhou belong to?

Changzhou is a prefecture-level city in Jiangsu Province, and Jiangyin is a county-level city under the jurisdiction of Wuxi, a prefecture-level city in Jiangsu Province. Jiangyin has always belonged to Changzhou. If Changzhou merges Jiangyin instead of Jintan in northern Jiangsu, Changzhou's economy will definitely surpass Wuxi's. Besides Jingjiang. Jingjiang was an island in the Yangtze River in the early Ming Dynasty. It is called Matosha, similar to Chongming Island. In the Ming Dynasty, the residents of Matosha were just old people who spoke Wu. To put it bluntly, Jingjiang belonged to Matosha in Jiangyin period, and only the old shore people who spoke Wu language could not speak Huai language. Now Jiangyin and Jingjiang have their own ways. Jiangyin belongs to Wuxi Jingjiang and Taizhou, Jiangyin dialect is a pure Wu dialect, and Jingjiang dialect has been seriously eroded by Jianghuai Mandarin.