Datong is a prefecture-level city in northern Shanxi Province, in the People's Republic of China. It lies in the Datong Basin at an elevation of 1,040 metres (3,410 ft), bordering Inner Mongolia to the north and west and Hebei province to the east.
At the 2020 census the city had a population of 3,105,591, of whom 1,790,452 lived in the built-up area formed by two of its four urban districts, Pingcheng and Yungang; the remaining districts, Yunzhou and Xinrong, are not yet conurbated with that core.
The reference material provided does not identify a city named Datong in the Fujian region of China. The only Datong documented in the source is the prefecture-level city in northern Shanxi Province described above, and no information about a Fujian city of that name is available here.