Official website inquired that the area code 0352 belongs to Datong City, Shanxi Province, which was called Yunzhong, Pingcheng and Yunzhou in ancient times. It is also known as China Coal Capital, the second largest city in Shanxi Province. By 2022, the city will have four districts and six counties, with a total area of 14 176 square kilometers and a permanent population of 3 10.0. Datong is also one of the largest coal energy bases in China, the national heavy chemical energy base, the midpoint of Shenfu, Zhungeer emerging energy zone and Beijing-Tianjin-Tangshan industrial zone, and is known as "Phoenix City" and "China Coal Capital".