Is there accommodation between Dunhuang and Delingha?

There is accommodation. On the way from Dunhuang to Delingha, you can stay in Dachaidan for one night. The conditions of Dachaidan Zhuo Ya Business Hotel are good. If you don't stay in Dachaidan, there is basically no town to stay in. Dunhuang is a county-level city under the jurisdiction of Gansu Province, managed by Jiuquan City, and located at the westernmost end of Hexi Corridor, where Gansu, Qinghai and Xinjiang provinces (regions) meet.