Does Tongcheng belong to southern Anhui or northern Anhui?

If the Jianghuai water system is taken as the boundary, the Huaihe River basin is in northern Anhui and the Yangtze River system is in southern Anhui. Dabie Mountain-Chaohu Lake is divided into southern Anhui and northern Anhui. Generally, it is bounded by the Yangtze River, with northern Anhui in Jiangbei and southern Anhui in Jiangnan.

Topographically, Anhui is mainly divided into five topographic regions: Huaibei Plain, Chaohu Basin, the middle and lower reaches of the Yangtze River Plain, southern Anhui Mountain Area and Dabie Mountain Area. Among them, Huaibei plain is mainly in northern Anhui; The plains in the middle and lower reaches of the Yangtze River and the mountainous areas in southern Anhui are now southern Anhui.

Southern Anhui is located in the south of Anhui Province, bordering the plain along the Yangtze River in the north, Jiangsu and Zhejiang in the southeast and Jiangxi in the southwest, including Tongling, Wuhu, Maanshan and parts of Chizhou, Xuancheng and Huangshan, with a total area of 310.2 million square kilometers.

Northern Anhui, the abbreviation of northern Anhui Province, is located in the Yangtze River Delta urban agglomeration headed by Shanghai, bordering Jiangsu in the east, southern Anhui in the south, Henan in the west and Shandong in the north. The terrain is dominated by plains, and there is a vast Huaibei plain, which is in a strategic position of north-south and east-west. The main passage is the Eurasian Continental Bridge, which is the only Belt and Road passing area in Anhui Province.