15 days. It is the statistical information released by Tongling Health and Health Commission. Tongling, referred to as the copper capital for short, was called Dingling and Yi 'an in ancient times. It is a prefecture-level city under the jurisdiction of Anhui Province, located in the center of the Yangtze River Delta. Located in East China, south-central Anhui Province, the lower reaches of the Yangtze River, Hefei in the north, Chizhou in the south, Wuhu in the east and Anqing in the west.