Datong Bank. Datong is a prefecture-level city under the jurisdiction of Shanxi Province and one of the provincial sub-central cities established by the Shanxi Provincial Government. Inquiring about official website and Datong City, we know that the annual interest rate of Datong Bank in this city is 2.25%, and the two-year interest rate is 2.835%, which has the highest interest rate and is deeply loved by people.