Where can I take the bus from Dunhuang to Yadan Devil City? What time does the bus depart? How many trips a day are there? What time does it take to return to Dunhuang?

I just came back from Dunhuang. Dunhuang International Youth Hostel can provide a round-trip bus agency (free). The actual bus company is the carrier, and the model is determined based on the number of people signing up every day (it will not be a bus) , usually at 7 a.m. and every 2 p.m. It is recommended to go in the afternoon to watch the sunset.