Shanxi province. Datong, also known as China Coal Capital, is a prefecture-level city under the jurisdiction of Shanxi Province, a II-type big city, the second largest city in Shanxi Province, the central city in the Shanxi-Hebei-Mongolia border region determined by the State Council and one of the important comprehensive energy bases. By 2022, there will be four districts and six counties in the city with a total area of 1, 4 1.76 square kilometers and a permanent population of 3 1.0.