Hi, I'm having a hard time planning my trip from Dunhuang to Jiayuguan and then to Zhangye.

I will arrive in the early morning in DH from a sleeper train from Lanzhou. How many days do you recommend I stay in DH. I want to visit Mogao caves, Echoing-Sand Mountain and Crescent lake, Yardang national park and the night Market. After DH I want to go to Jiayuguan to visit the pass and then to Zhangye to visit the danxia national landform geopark. I travel on a budget, so I will be mostly relying on public transport. I also want to be efficient, so visit alot of things in little time. I was thinking of staying for 3 days in DH and then 1 day in Zhangye and 1 dag in Jiayuguan. Thanks in advance!