Does part of Chongming Island belong to Jiangsu?

Chongming Island is jointly administered by Shanghai and Jiangsu. Most of Chongming Island belongs to Chongming District, Shanghai, and a few belong to Qilong Town, Qidong City, Nantong City, Jiangsu Province and Haiyong Town, Haimen District, Nantong City. This will happen mainly because of the location of Chongming Island. Chongming Island, also known as Chongming Sha 'an, is located at the mouth of the Yangtze River in the north of Shanghai, facing Qidong City and Haimen District of Nantong City, Jiangsu Province across the north branch waterway of the Yangtze River estuary.

Does Chongming Island belong to Shanghai or Jiangsu?

Chongming Island is an alluvial island in the mouth of the Yangtze River Delta, the third largest island in China, the largest alluvial island in China and the largest sand island in China. With a land-making history of 1300 years, it is known as the "gateway to the Yangtze River and Yingzhou in the East China Sea". The island has a flat terrain, fertile land, lush trees and rich products, and is a famous land of plenty.

The origin of the name of Chongming Island is the regional name set on the island according to the records of Shanghai Toponyms. In the 10 century, Yang Wu of the Five Dynasties set up Chongming Town in Gujunsha (also known as Xisha, one of the two sandbars that first formed Chongming Island), which was the beginning of Chongming's name. In the 14th year of Yuan Dynasty (A.D. 1277), the salt field was changed to Chongming, and Ming Taizu once gave the word "Yingzhou in the East China Sea", hence the name Yingzhou or Guyingzhou.