It is suggested to use Baidu or Gaode Map App to search the route information between the two places, and you can find the bus information between the two places, as shown below.
As can be seen from the above figure, it takes 1 hour 13 minutes for Xining-Datong Bus to get off at datong county Hospital Bus Station, and the fare is 4- 10 yuan after 46 stops. The first and last bus times are 8 am and 20 pm respectively.
The above only represents personal suggestions, hope to adopt them, thank you!