[ryenus]

Since you have Zhangye, you might also want to include Dunhuang (https://en.wikipedia.org/wiki/Dunhuang)?

And there's Mogao Caves (https://en.wikipedia.org/wiki/Mogao_Caves) which can't be missed.

[intofarlands]

Absolutely, Dunhuang is such a crucial component of the Silk Roads. However I am only including the places we have traveled through ourselves, and we were not able to fit in Dunhuang when we were passing through the area.

This Silk Road experience is a project I anticipate working on over the next few years.