Changxing Township is located in the south waterway of Chang Jiang outside Wusongkou, neighboring Hengsha Island in the southeast and Chongming Island in the north. It has 3 communities and 24 administrative villages under its jurisdiction. Changxing Island into a land in the Xianfeng years, the island is belt-shaped, east-west length of 26.8 kilometers, north-south width of 2-4 kilometers.